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Question

In Shepherd's Purse, the fruit shape is controlled by

A
Supplementary genes
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B
Complementary genes
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C
Duplicate genes
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D
Polymeric genes
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Solution

The correct option is D Duplicate genes

A.Supplementary genes – Two indepednet pairs of genes, which interact to produce a new trait together, but each dominant gene alone produces its own trait, are called Supplementary genes. eg: comb types in chickens

B.Complementary genes – Two independent pairs of genes, which interact to produce a trait together, but each dominant gene alone does not show its effect, are called complementary genes. eg: flower colour in Lathyrus

C.Duplicate genes – If the dominant alleles of two genes loci produce the same phenotype. eg:capsule of Sheperd’s purse.

D.Polymeric genes - Two independent dominant genes, whether present in homozygous or heterozygous condition, have similar phenotypic effect when present individually but produce a cumulative or double effect when found together. Eg:flower colour of Lathyrus

So, the correct option is ‘Duplicate genes’.

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