Question

In chickens, black and white feathers are codominant. Cross a black-feathered chicken with a checkered (black and white) feathered chicken. Identify the possible alleles. Bb BbGg Identify the genotypes of the parents. Create a Punnett square on your own paper for this cross. What is the ratio of the possible phenotypes of the F1 generation

Answer 1

The parental cross is BB x BW.

The F1 generation will have the ratio 1 BB : 1 BW

Step-by-step explanation:

Black (B) and white (W) feathers are codominant. This means that if an individual has both B and W alleles (BW genotye) its feathers will show both colors at the same time (checkered).

A cross occurrs between a black feathered (BB) and a checkered chicken (BW).

The BB chicken can only produce B gametes.

The BW chicken can produce B or W gametes.

The Punnett Square (which I attach) is done by combining the gametes to obtain the possible F1 offspring. It shows that the F1 generation will have the following genotypes and phenotypes:

• 1/2 BB (Black feathers)
• 1/2 BW (Checkered feathers)