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.