Test: High School Biology

1.

Black fur (A) is dominant to brown fur (a) and brown eyes (B) are dominant to blue eyes (b) in mice. Two mice are heterozygous for both traits. If one of the offspring shows a phenotype for green eyes, what is most likely the best explanation for this?

Independent assortment must have occurred

Codominance must have occurred in this particular offspring

A new mutation must have occurred

The parental genotypes reported initially must have been incorrect

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