Sex Determination — Formula Sheet
Telangana Open School (TOSS) · Class 12 · Biology
3 formulas from Sex Determination (Telangana Open School (TOSS) Class 12 Biology) on one page, grouped by topic.
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Formulas and Key Relations
Types of Sex Determination
Sex Index Ratio = X / A
Sex Determination in Drosophila – Genic Balance Theory
If X/A = 1.0 or more → Female; if X/A = 0.5 or less → Male; if between 0.5 and 1.0 → Intersex.
Ratio ≥ 1.0 → Female; ≤ 0.5 → Male; between → Intersex.
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