Question

Identify which genotype parent combination(s) would yield the following phenotypes in mouse offspring:

· only white fur offspring
· only black fur offspring
· mixture of black and white offspring (two different genotype combinations possible)

(This is a written response).

Answer 1

· Only white fur offspring: The homozygous recessive.

· Only black fur offspring: The homozygous dominant.

· Mixture of black and white offspring: The heterozygous codominance.

Step-by-step explanation:

• When there is same types of alleles in the genotype the condition is known as homozygous.
• If both alleles are dominant or recessive the phenotype will be Black or white.
• There is another phenomenon when both the alleles are expressed equally giving phenotype which contains both trait is known as codominance.
• The third statement is for the codominance phenomenon.