Question

In shorthorn cale the C R allele, when homozygous, produces animals with red hair and the C W allele, when homozygous, produces cale with white hair. An animal with a heterozygous genotype is roan in color, meaning its coat contains both red hairs and white hairs. a. Describe the expected offspring when a breeder mates cows and bulls of the following phenotypes: 1. red x roan 2. white x roan 3. roan x roan

Answer 1

1. red or roan

2. white or roan

3. red or white or roan

Step-by-step explanation:

According to the question, cale with red hair must have the genotype --> CR/CR

A cale with white hair has genotype --> CW/CW

A cale with roan hair has genotype --> CR/CW

Therefore for the cross:

1. red X roan -- the genotype of the patents must be CR/CR X CR/CW

based on this cross the expected offspring should have the genotype

CR/CR; CR/CW

Therefore, the phenotype resulting from this cross should be either a red or a roan offspring.

2. white X roan

The cross would be as follows :

CW/CW X CR/CW ----> CW/CR ; CW/CW

Therefore, the phenotype of the offspring would be roan or white.

3. roan X roan

The cross would be as follows :

CR/CW X CR/CW ---> CR/CR ; CR/CW ; CW/CW

the offspring can be red or white or roan.