Topic: Deviations: incomplete dominance, co-dominance, multiple alleles, blood groups, pleiotropy, polygenic inheritance· Genetics and Evolution

Which of the following pairs is wrongly matched ?

1. Starch synthesis in pea : Multiple alleles

2. XO type sex determination : Grasshopper

3. ABO blood grouping : Co-dominance

4. T.H. Morgan : Linkage

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Answer: 1. Starch synthesis in pea : Multiple alleles

Starch synthesis in pea is an example of pleiotropy (one gene, many effects), not multiple alleles.

The gene that controls starch synthesis (starch-branching enzyme) also affects seed shape and size, so one gene gives several effects. Multiple alleles means three or more alleles of one gene, as in ABO blood groups. The other pairs are right: XO sex determination in grasshopper, ABO shows co-dominance (I^A and I^B), and Morgan studied linkage.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following pairs is *wrongly* matched ?

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