First slide

Inheritance of Two Genes

Question

What is the phenotypic ratio in a cross between dihybrid and homozygous recessive individual?

Easy

A

1:1
B

1:1:1:1
C

1:1:1:1:1:1:1:1
D

9:3:3:1

Solution

When a dihybrid is crossed with homozygous recessive individual it is an example of test cross and the phenotypic ratio of test cross is 1:1:1:1

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