In corn, the seeds can be either colored ( C ) or white ( c ), and either non-sh

Question

In corn, the seeds can be either colored (C) or white (c), and either non-shrunken (Sh) or shrunken (sh). You crossed a homozygous colored, shrunken line (CCshsh) to a homozygous white, non-shrunken line (ccShSh) and obtained a F1 which you self-fertilized to obtain the following F2 progeny:

Phenotype                            Number of Plants

Colored, non-shrunken                   1031

Colored, shrunken                           473

White, non-shrunken                      465

White, shrunken                              31

a.) What were the phenotype and the genotype of the F1?

b.) These genes are linked, are they in coupling or repulsion?

c.) Calculate the percent recombination between these two genes.

Explanation / Answer

a)F1=CcShsh(colored non shrunken)

CCshsh*ccShSh(parents)

Csh* cSh(gametes)

from F2 can determine the dominant colored ,nonshrunken are dominant as they are more in number

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