How do you set up & determine the results of a dyhybrid cross?

Expert Solution

Ans-

Dyhybrib cross is a cross between two different varities that differ in two observed traits. In the name "dihybrid" the "di" indicates that two different lines are involved in the cross i.e. R and Y, the hybrid means that each trait has two different alleles i.e. R, r and Y,y and cross means that there are two individuals that are combining their genetic information.

The dihybrid cross is visualised by the Punnett square of dimensions 4×4.

The phenotypic ratio of 9:3:3:1 is the result of the dihybrib cross where:

1. The 9 represents the proportion of individuals displaying both dominant traits.

2. The first 3 represents the individuals that display the first dominant trait and the second recessive trait.

3. The second 3 represents the individual that display the first recessive trait and the second dominant trait.

4. The 1 represents the homozygous individual displaying both recessive traits.

gladiator answered 1 year ago

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