Section: Biology
7)
A researcher performs a cross between 2 mice, both having black fur. Black for is dominant over white for. 75% of the offspring have black coats and 25% have white coats. The researcher can assume that the parents genotypes were most likely:
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Explanation
The ratio of black fur mice to white fur mice is 3:1. This means the offspring
were BB, Bb, Bb, and bb. When you draw a Punnett square to figure out the genotype of the parents, you get Bb x Bb.
