Question

In a cross between dihybrids for genes that each have a dominant allele and a recessive...

In a cross between dihybrids for genes that each have a dominant allele and a recessive allele, what proportion of the progeny would be homozygous recessive for all the genes involved?

A. 1/32

B. 1/16

C. 1/8

D. 1/4

E. 1/2

D.

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Answer #1

OPTION B IS THE CORRECT ANSWER.

Dihybrid cross : these crosses are made to study the inheritance of 2 pairs of genes.

Here, the parent will be AaBb

NO.OF GAMETES = 2n (n is the no.of genes) = 22

Proportion of the progeny that would be homozygous recessive for all the genes involved = 1/16

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