A white mouse has parents that are both white. The white mouse produces only brown offspring when it mates with a brown mouse. What genotype is the white mouse?

Question

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4 points
heterozygous
homozygous recessive
homozygous dominant
insufficient information to determine genotype

Answer 1

The information provided indicates that the white mouse produces only brown offspring when it mates with a brown mouse. This means that the white mouse must carry the dominant allele for brown fur. Therefore, the genotype of the white mouse must be heterozygous.