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Do a Monohybrid cross: Black hair is dominant to white hair in mice. Cross a heterozygous black with a white. Determine the genotypic and phenotypic ratios of the offspring

User Roomcayz
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Answer: The genotypic ratio of the offspring is 1 Bb: 1 bb, and the phenotypic ratio is 1 Black hair: 1 White hair.

Explanation: In this monohybrid cross, where black hair is dominant to white hair in mice, we'll cross a heterozygous black mouse (Bb) with a white mouse (bb).

To determine the genotypic and phenotypic ratios of the offspring, we'll use Punnett square analysis:

Punnett Square: b | Bb | bb |

Genotypic Ratio:

The genotypic ratio represents the possible combinations of alleles in the offspring.

From the Punnett square, we have:

1 Bb (heterozygous black) and 1 bb (white)

Therefore, the genotypic ratio is:

1:1 or 1 Bb: 1 bb

Phenotypic Ratio:

The phenotypic ratio represents the observable traits in the offspring.

From the genotypic ratio, we can infer that:

1 offspring will have black hair (Bb)

1 offspring will have white hair (bb)

Therefore, the phenotypic ratio is:

1:1 or 1 Black hair: 1 White hair

In summary, the genotypic ratio of the offspring is 1 Bb: 1 bb, and the phenotypic ratio is 1 Black hair: 1 White hair.

User AlanSE
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