<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: transparent;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .stepper {
      display: flex;
      gap: 8px;
      align-items: center;
      justify-content: center;
      margin-bottom: 8px;
      width: 100%;
      max-width: 360px;
    }

    .step-btn {
      flex: 1;
      padding: 6px 4px;
      font-size: 13px;
      font-weight: 700;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      background: #ffffff;
      color: #64748b;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
    }

    .step-btn.active {
      background: #8b5cf6;
      border-color: #8b5cf6;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(139, 92, 246, 0.3);
    }

    .play-btn {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #64748b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      transition: all 0.2s ease;
      flex-shrink: 0;
    }

    .parents-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      height: 36px;
      margin-bottom: 6px;
      font-size: 18px;
      font-weight: 800;
    }

    .parent-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: #f3e8ff;
      border: 1.5px solid #d8b4fe;
      border-radius: 8px;
      color: #6b21a8;
      transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .grid-container {
      display: grid;
      grid-template-columns: 44px 1fr 1fr;
      grid-template-rows: 44px 1fr 1fr;
      gap: 8px;
      width: 100%;
      max-width: 340px;
      aspect-ratio: 1 / 1;
      margin: 0 auto;
    }

    .header-cell {
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      background: #f8fafc;
      border-radius: 8px;
      color: #334155;
      border: 1.5px dashed #cbd5e1;
      transition: all 0.3s ease;
    }

    .header-cell.active-allele {
      background: #f1f5f9;
      border: 2px solid #94a3b8;
      color: #0f172a;
    }

    .corner-cell {
      background: transparent;
      border: none;
    }

    .cell {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      border-radius: 12px;
      background: #f8fafc;
      border: 2px dashed #e2e8f0;
      transition: all 0.35s ease;
      min-height: 80px;
    }

    .cell .geno {
      font-size: 20px;
      font-weight: 800;
      line-height: 1;
      opacity: 0;
      transform: translateY(4px);
      transition: all 0.3s ease;
    }

    .cell .flower {
      width: 28px;
      height: 28px;
      opacity: 0;
      transform: scale(0.6);
      transition: all 0.35s ease;
    }

    /* Step states */
    .step-1 .parent-tag {
      transform: scale(1.05);
      box-shadow: 0 3px 8px rgba(139, 92, 246, 0.25);
    }
    .step-1 .header-cell {
      opacity: 0.25;
    }

    .step-2 .header-cell {
      opacity: 1;
      border-style: solid;
      background: #e0e7ff;
      border-color: #818cf8;
      color: #3730a3;
      transform: scale(1.02);
    }

    .step-3 .header-cell {
      opacity: 1;
      border-style: solid;
      background: #f1f5f9;
      border-color: #cbd5e1;
    }

    .step-3 .cell.purple-box {
      background: #faf5ff;
      border: 2px solid #a855f7;
      box-shadow: 0 3px 10px rgba(168, 85, 247, 0.15);
    }
    .step-3 .cell.purple-box .geno {
      color: #6b21a8;
      opacity: 1;
      transform: translateY(0);
    }
    .step-3 .cell.purple-box .flower {
      opacity: 1;
      transform: scale(1);
    }

    .step-3 .cell.white-box {
      background: #ffffff;
      border: 2px solid #64748b;
      box-shadow: 0 3px 10px rgba(100, 116, 139, 0.15);
    }
    .step-3 .cell.white-box .geno {
      color: #334155;
      opacity: 1;
      transform: translateY(0);
    }
    .step-3 .cell.white-box .flower {
      opacity: 1;
      transform: scale(1);
    }

    .ratio-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      font-size: 14px;
      font-weight: 700;
      height: 28px;
      margin-top: 6px;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .step-3 .ratio-bar {
      opacity: 1;
    }

    .ratio-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .flower-icon {
      display: inline-block;
      width: 18px;
      height: 18px;
      border-radius: 50%;
    }
  </style>
</head>
<body>

  <div class="stepper">
    <button class="step-btn active" data-step="0">1. Parents</button>
    <button class="step-btn" data-step="1">2. Gametes</button>
    <button class="step-btn" data-step="2">3. Cross</button>
    <button class="play-btn" id="playToggle" title="Auto play">⏸</button>
  </div>

  <div class="parents-row">
    <div class="parent-tag">
      <svg width="18" height="18" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
      Bb
    </div>
    <span style="color:#94a3b8;font-weight:900;">×</span>
    <div class="parent-tag">
      <svg width="18" height="18" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
      Bb
    </div>
  </div>

  <div id="board" class="grid-container step-1">
    
    <div class="corner-cell"></div>
    <div class="header-cell top-allele">B</div>
    <div class="header-cell top-allele">b</div>

    
    <div class="header-cell side-allele">B</div>
    <div class="cell purple-box">
      <span class="geno">BB</span>
      <svg class="flower" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
    </div>
    <div class="cell purple-box">
      <span class="geno">Bb</span>
      <svg class="flower" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
    </div>

    
    <div class="header-cell side-allele">b</div>
    <div class="cell purple-box">
      <span class="geno">Bb</span>
      <svg class="flower" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
    </div>
    <div class="cell white-box">
      <span class="geno">bb</span>
      <svg class="flower" viewBox="0 0 24 24"><path fill="#f8fafc" stroke="#64748b" stroke-width="1.5" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
    </div>
  </div>

  <div class="ratio-bar">
    <div class="ratio-item" style="color: #6b21a8;">
      <svg width="16" height="16" viewBox="0 0 24 24"><path fill="#9333ea" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
      <span>3 Purple</span>
    </div>
    <span style="color:#94a3b8;">:</span>
    <div class="ratio-item" style="color: #475569;">
      <svg width="16" height="16" viewBox="0 0 24 24"><path fill="#f8fafc" stroke="#64748b" stroke-width="1.5" d="M12 2a4 4 0 0 0-4 4c0 1.2.5 2.2 1.3 3A4 4 0 0 0 6 12a4 4 0 0 0 3.3 3.9A4 4 0 0 0 8 18a4 4 0 0 0 4 4 4 4 0 0 0 4-4c0-.8-.2-1.5-.7-2.1A4 4 0 0 0 18 12a4 4 0 0 0-3.3-3c.8-.8 1.3-1.8 1.3-3a4 4 0 0 0-4-4z"/><circle cx="12" cy="12" r="3.5" fill="#facc15"/></svg>
      <span>1 White</span>
    </div>
  </div>

  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <script>
    const board = document.getElementById('board');
    const stepBtns = document.querySelectorAll('.step-btn');
    const playToggle = document.getElementById('playToggle');

    let currentStep = 0;
    let isPlaying = true;
    let timer = null;

    function setStep(idx) {
      currentStep = (idx + 3) % 3;
      board.className = 'grid-container step-' + (currentStep + 1);
      stepBtns.forEach((btn, i) => {
        btn.classList.toggle('active', i === currentStep);
      });
    }

    function startTimer() {
      stopTimer();
      timer = setInterval(() => {
        setStep(currentStep + 1);
      }, 3200);
      isPlaying = true;
      playToggle.textContent = '⏸';
    }

    function stopTimer() {
      if (timer) {
        clearInterval(timer);
        timer = null;
      }
      isPlaying = false;
      playToggle.textContent = '▶';
    }

    stepBtns.forEach(btn => {
      btn.addEventListener('click', () => {
        const step = parseInt(btn.dataset.step, 10);
        setStep(step);
        stopTimer();
      });
    });

    playToggle.addEventListener('click', () => {
      if (isPlaying) {
        stopTimer();
      } else {
        startTimer();
      }
    });

    startTimer();
  </script>
</body>
</html>

Monohybrid Crosses and Punnett Squares

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      background: transparent;
      color: #1e2945;
      padding: 16px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
    }

    .cross-title {
      font-size: 15px;
      font-weight: 700;
      color: #475569;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .cross-badge {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      padding: 3px 10px;
      border-radius: 6px;
      font-weight: 800;
      color: #1e2945;
      font-size: 15px;
      letter-spacing: 0.5px;
    }

    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      width: 100%;
      max-width: 520px;
    }

    .ratio-panel {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
    }

    .panel-header {
      font-size: 14px;
      font-weight: 700;
      color: #64748b;
      margin-bottom: 4px;
      text-align: center;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .ratio-number {
      font-size: 22px;
      font-weight: 900;
      color: #0f172a;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .bar-stack {
      width: 100%;
      height: 260px;
      display: flex;
      flex-direction: column;
      border-radius: 12px;
      overflow: hidden;
      border: 2px solid #cbd5e1;
      background: #f8fafc;
      box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
    }

    .segment {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      transition: filter 0.15s ease, opacity 0.15s ease;
      cursor: default;
      position: relative;
    }

    .segment:hover {
      filter: brightness(0.95);
    }

    /* Genotype Colors */
    .seg-bb-dom {
      height: 25%;
      background: #7c3aed;
      color: #ffffff;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.4);
    }

    .seg-bb-het {
      height: 50%;
      background: #9333ea;
      color: #ffffff;
      border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    }

    .seg-bb-rec {
      height: 25%;
      background: #f8fafc;
      color: #334155;
    }

    /* Phenotype Colors */
    .seg-pheno-purple {
      height: 75%;
      background: linear-gradient(180deg, #7c3aed 0%, #9333ea 100%);
      color: #ffffff;
      border-bottom: 2px solid #cbd5e1;
    }

    .seg-pheno-white {
      height: 25%;
      background: #ffffff;
      color: #334155;
    }

    .seg-title {
      font-size: 15px;
      font-weight: 800;
      line-height: 1.1;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .seg-sub {
      font-size: 12px;
      font-weight: 600;
      opacity: 0.92;
      margin-top: 3px;
    }

    .seg-bb-rec .seg-sub,
    .seg-pheno-white .seg-sub {
      color: #64748b;
      opacity: 1;
    }

    @media (max-width: 380px) {
      .comparison-grid {
        gap: 12px;
      }
      .ratio-number {
        font-size: 18px;
        margin-bottom: 8px;
      }
      .panel-header {
        font-size: 12px;
      }
      .seg-title {
        font-size: 13px;
      }
      .seg-sub {
        font-size: 11px;
      }
      .bar-stack {
        height: 220px;
      }
    }
  </style>
</head>
<body>

  <div class="cross-title">
    CROSS: <span class="cross-badge">Bb × Bb</span>
  </div>

  <div class="comparison-grid">
    
    <div class="ratio-panel">
      <div class="panel-header">Genotypic Ratio</div>
      <div class="ratio-number">1 : 2 : 1</div>
      <div class="bar-stack">
        <div class="segment seg-bb-dom">
          <div class="seg-title">1 BB</div>
          <div class="seg-sub">¼ · 25%</div>
        </div>
        <div class="segment seg-bb-het">
          <div class="seg-title">2 Bb</div>
          <div class="seg-sub">½ · 50%</div>
        </div>
        <div class="segment seg-bb-rec">
          <div class="seg-title">1 bb</div>
          <div class="seg-sub">¼ · 25%</div>
        </div>
      </div>
    </div>

    
    <div class="ratio-panel">
      <div class="panel-header">Phenotypic Ratio</div>
      <div class="ratio-number">3 : 1</div>
      <div class="bar-stack">
        <div class="segment seg-pheno-purple">
          <div class="seg-title">3 Purple 🪻</div>
          <div class="seg-sub">¾ · 75%</div>
        </div>
        <div class="segment seg-pheno-white">
          <div class="seg-title">1 White 🤍</div>
          <div class="seg-sub">¼ · 25%</div>
        </div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px 16px;
      gap: 12px;
    }

    /* Tabs / Selector */
    .btn-group {
      display: flex;
      gap: 8px;
      width: 100%;
      max-width: 480px;
      justify-content: center;
    }
    .toggle-btn {
      flex: 1;
      padding: 8px 6px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #d1d5db;
      background: #f8f9fa;
      color: #4b5563;
      border-radius: 8px;
      cursor: pointer;
      text-align: center;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }
    .toggle-btn.active {
      background: #7c3aed;
      color: #ffffff;
      border-color: #7c3aed;
      box-shadow: 0 2px 6px rgba(124, 58, 237, 0.25);
    }

    /* Main visual layout */
    .stage {
      width: 100%;
      max-width: 500px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    /* Chromosome container */
    .chrom-section {
      width: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }
    .locus-header {
      font-size: 13px;
      font-weight: 600;
      color: #6b7280;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .chromosomes-box {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 40px;
      position: relative;
      padding: 4px 16px;
    }

    /* Chromosome CSS Graphics */
    .chrom-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }
    .chromosome {
      width: 28px;
      height: 120px;
      background: #e2e8f0;
      border-radius: 14px;
      position: relative;
      box-shadow: inset 0 0 0 2px #cbd5e1;
      display: flex;
      justify-content: center;
    }
    .centromere {
      position: absolute;
      top: 52px;
      width: 18px;
      height: 14px;
      background: #94a3b8;
      border-radius: 6px;
    }
    .band {
      position: absolute;
      top: 22px;
      width: 100%;
      height: 22px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 15px;
      color: #fff;
      transition: background 0.3s ease, transform 0.2s ease;
      box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    }
    .band.dominant {
      background: #7c3aed;
      color: #ffffff;
    }
    .band.recessive {
      background: #ffffff;
      color: #4b5563;
      box-shadow: inset 0 0 0 1.5px #94a3b8;
    }
    .chrom-label {
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
    }

    /* Locus pointer lines */
    .locus-line {
      position: absolute;
      top: 36px;
      height: 2px;
      background: #cbd5e1;
      z-index: -1;
      width: 160px;
    }

    /* Flow arrow */
    .flow-arrow {
      font-size: 20px;
      color: #94a3b8;
      line-height: 1;
    }

    /* Result Outcome Card */
    .result-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 440px;
    }
    .info-tile {
      background: #f8fafc;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      text-align: center;
    }
    .tile-tag {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
    }
    .tile-val {
      font-size: 18px;
      font-weight: 800;
      color: #1e2945;
    }
    .tile-sub {
      font-size: 12px;
      font-weight: 600;
      color: #7c3aed;
    }

    .flower-display {
      font-size: 32px;
      line-height: 1;
      margin: 2px 0;
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
      transition: filter 0.3s ease;
    }
    .flower-white {
      filter: grayscale(1) brightness(1.7) drop-shadow(0 2px 3px rgba(0,0,0,0.15));
    }
  </style>
</head>
<body>

  
  <div class="btn-group">
    <button class="toggle-btn" id="btn-BB" onclick="setMode('BB')">BB<br><span style="font-size:11px; font-weight:400;">Dominant</span></button>
    <button class="toggle-btn active" id="btn-Bb" onclick="setMode('Bb')">Bb<br><span style="font-size:11px; font-weight:400;">Heterozygous</span></button>
    <button class="toggle-btn" id="btn-bb" onclick="setMode('bb')">bb<br><span style="font-size:11px; font-weight:400;">Recessive</span></button>
  </div>

  <div class="stage">
    
    <div class="chrom-section">
      <div class="locus-header">✦ Gene for flower color ✦</div>
      <div class="chromosomes-box">
        <div class="locus-line"></div>
        
        
        <div class="chrom-wrapper">
          <div class="chromosome">
            <div class="band dominant" id="allele-1">B</div>
            <div class="centromere"></div>
          </div>
          <span class="chrom-label">Homolog 1</span>
        </div>

        
        <div class="chrom-wrapper">
          <div class="chromosome">
            <div class="band recessive" id="allele-2">b</div>
            <div class="centromere"></div>
          </div>
          <span class="chrom-label">Homolog 2</span>
        </div>
      </div>
    </div>

    <div class="flow-arrow">↓</div>

    
    <div class="result-grid">
      <div class="info-tile">
        <div class="tile-tag">Genotype</div>
        <div class="tile-val" id="genotype-code">Bb</div>
        <div class="tile-sub" id="genotype-type">Heterozygous</div>
      </div>
      <div class="info-tile">
        <div class="tile-tag">Phenotype</div>
        <div class="flower-display" id="flower-icon">🌸</div>
        <div class="tile-sub" id="phenotype-text" style="color: #7c3aed;">Purple Flower</div>
      </div>
    </div>
  </div>

  <script>
    const data = {
      'Bb': {
        a1: 'B', a1Class: 'dominant',
        a2: 'b', a2Class: 'recessive',
        code: 'Bb',
        type: 'Heterozygous',
        flower: '🌸',
        whiteFlower: false,
        phenotype: 'Purple Flower',
        color: '#7c3aed'
      },
      'BB': {
        a1: 'B', a1Class: 'dominant',
        a2: 'B', a2Class: 'dominant',
        code: 'BB',
        type: 'Homozygous Dominant',
        flower: '🌸',
        whiteFlower: false,
        phenotype: 'Purple Flower',
        color: '#7c3aed'
      },
      'bb': {
        a1: 'b', a1Class: 'recessive',
        a2: 'b', a2Class: 'recessive',
        code: 'bb',
        type: 'Homozygous Recessive',
        flower: '🌸',
        whiteFlower: true,
        phenotype: 'White Flower',
        color: '#64748b'
      }
    };

    function setMode(mode) {
      document.querySelectorAll('.toggle-btn').forEach(b => b.classList.remove('active'));
      document.getElementById('btn-' + mode).classList.add('active');

      const d = data[mode];
      
      // Update Allele 1
      const a1 = document.getElementById('allele-1');
      a1.textContent = d.a1;
      a1.className = 'band ' + d.a1Class;

      // Update Allele 2
      const a2 = document.getElementById('allele-2');
      a2.textContent = d.a2;
      a2.className = 'band ' + d.a2Class;

      // Update Genotype & Phenotype
      document.getElementById('genotype-code').textContent = d.code;
      document.getElementById('genotype-type').textContent = d.type;
      
      const fIcon = document.getElementById('flower-icon');
      fIcon.className = 'flower-display' + (d.whiteFlower ? ' flower-white' : '');

      const pText = document.getElementById('phenotype-text');
      pText.textContent = d.phenotype;
      pText.style.color = d.color;
    }
  </script>
</body>
</html>

DNA as a Polymer and Double Helix Structure

Nucleotides and Complementary Base Pairing

The Human Genome and Genetic Material Organisation

How the Genetic Code Directs Protein Synthesis

Non-Coding DNA and Gene Regulation

The Human Genome Project and Medical Advances

Interactions Between Genome and Environment

science

DNA and the Human Genome

Meiotic Mechanisms of Genetic Variation

Gene Mutations as the Ultimate Source of New Alleles

Polygenic Traits and Continuous vs Discontinuous Variation

Environmental Influences on Phenotype and Epigenetics

Continuity of Species: Faithful DNA Replication and Repair

Differential Reproductive Success and Selection Pressures

Directional, Stabilising, and Disruptive Selection Models

Genetic Variation, Continuity, and Natural Selection

Key Terms in Genetics: Alleles, Genotype, and Phenotype

Predicting Genotype and Phenotype Ratios

Sex Determination and Sex Chromosomes

Inherited Disorders: Cystic Fibrosis and Polydactyly

Analysing Family Pedigree Charts

Embryo Screening and Gene Therapy Ethics

Polygenic Inheritance and Complex Traits

Monohybrid Inheritance and Genetic Crosses

Prezygotic Isolation: Behavioural, Temporal, and Mechanical

Postzygotic Isolation: Hybrid Inviability and Sterility

Geographical Isolation and Allopatric Speciation Pathways

Ecological and Sympatric Speciation Without Physical Barriers

Genetic Drift, Population Bottlenecks, and Founder Effects

Accumulation of Mutations and Gene Pool Divergence

Hardy-Weinberg Equilibrium: Calculating Allele Frequencies

Factors Disrupting Hardy-Weinberg Equilibrium in Populations

Reproductive Isolation and Speciation

Calculating Probabilities and Percentages in Inheritance

Dihybrid Crosses and Independent Assortment

Incomplete Dominance and Intermediate Phenotypes

Codominance and Multiple Alleles in Blood Types

Sex-Linked Inheritance on X and Y Chromosomes

Using Pedigrees to Trace Inheritance Patterns

Mendelian Genetics, Non-Mendelian Inheritance, and Pedigrees

Continuous and Discontinuous Variation

Causes of Variation: Genetic, Environmental, and Combined

How Mutations Arise and Influence Phenotypes

Mutations in Protein Structure and Enzyme Active Sites

Calculating Percentages, Means, and Probability in Variation

Variation, Mutations, and Phenotypic Effects

Darwin's Theory of Evolution by Natural Selection

Comparing Darwin and Lamarckian Evolution

Speciation and Reproductive Isolation

Alfred Russel Wallace and Warning Colouration

Tracking Changes in Allele Frequency Over Time

Natural Selection and Evolutionary Change

Evidence for Evolution: The Fossil Record

Causes of Extinction and Mass Extinction Events

Case Study: Antibiotic Resistance in Bacteria

Linnaean Classification and Binomial Naming

Carl Woese and the Three-Domain System

Interpreting Evolutionary Trees

Evidence for Evolution and Classification Systems

Mendel's Laws of Inheritance

Using Punnett Squares for Monohybrid Crosses

Test Crosses: Determining Unknown Genotypes

Dihybrid Crosses: Tracking Two Traits at Once

Mendelian Genetic Crosses

Selective Breeding in Plants and Animals

Risks and Limitations of Selective Breeding

Principles of Genetic Engineering

Main Stages in Genetic Engineering and Bacterial Vectors

Genetically Modified Crops and Recombinant Insulin

Benefits, Risks, and Ethics of Gene Technology

Cloning Techniques in Plants and Animals

Mathematical Analysis in Genetics and Biotechnology

Selective Breeding and Genetic Technology

Incomplete Dominance: Blending Phenotypes

Codominance: Both Alleles Expressed Fully

Multiple Alleles: The ABO Blood Group System

Sex-Linked Traits: Genes on the X and Y Chromosomes

Solving Multi-Step Genetics Problems

Non-Mendelian Inheritance and Pedigrees

Using Ratios and Proportions in Genetic Crosses

Interpreting Pedigree Charts and Family Trees

Interpreting Continuous and Discontinuous Variation Data

Extracting Data from Evolution and Selection Experiments

Comparing Observed and Expected Genetic Ratios

Quantitative Skills in Genetics and Evolution

Genotype, Phenotype, and Alleles: The Basics

Mendelian Inheritance Principles: Segregation and Independent Assortment

Monohybrid Crosses: Using Punnett Squares

Predicting Genotype and Phenotype Ratios in Monohybrid Crosses

Dihybrid Crosses: Tracking Two Traits Simultaneously

Probability Rules in Genetic Predictions

Mendelian Genetics and Genetic Crosses

Incomplete Dominance: When Phenotypes Blend

Codominance: When Both Alleles Are Fully Expressed

Sex-Linked Traits: Genes on Sex Chromosomes

Non-Mendelian Inheritance and Genetic Analysis

OGS.10.GVE.3

OGS.10.GVE.3

Aligned learning resources

Related diagrams