Question

If black and white true-breeding mice are mated and the result is all gray offspring, what inheritance pattern would this be indicative of?

a. dominance

b. codominance

c. multiple alleles

d. incomplete dominance

Short answer

The correct option is D.

Step-by-step solution

Step. 1 Introduction 

When white and black mice mate, they blend their phenotypes and produce grey offspring; this seems to be an example of incomplete dominance.

Step. 2 Explanation for correct answer. 

Incomplete dominance comes out of a cross wherein every parental contribution is separate and distinct, giving rise to children with an intermediate phenotype.

Step. 3 Explanation for incorrect answer. 

Option a. Dominance is the occurrence in which one allelic form of a gene is expressed to the restriction of another in an individual with two allelic genes associated.

Option b. Codominance describes the phenomenon wherein two alleles are revealed to the same extent inside an organism.

Option c. Multiple alleles seem to be more than two different alleles of a genome together in population that inhabit the same location upon the chromosome or the homologue.