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When the F1 hybrid pea plants form gametes, the two alleles of a single gene separate so that each gamete carries only one allele. Which law of Mendel states this?
ALaw of dominance
BLaw of independent assortment
CLaw of use and disuse
DLaw of segregation
Answer & Solution
Correct answer: D. Law of segregation
1. The two alleles of a pair stay together in the hybrid without mixing.
2. During gamete formation they separate, so each gamete gets only one allele.
3. This separation into pure gametes is the law of segregation, also called purity of gametes, option D.
4. Independent assortment concerns two different gene pairs, not one, which rules out option B.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 18 Genetics "Mendel's Laws", p.271_
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