Guinea Pigs with bb allele pair have white hair... how many guinea pigs would have white hair? Guinea Pigs with SS and Ss allele pairs have short hair how many sheep would have short hair?

- 4 out of 16 guinea pigs would have white hair.

- 12 out of 16 guinea pigs would have short hair.

Explanation:

This question involves two genes. One coding for hair color and the other for hair length in guinea pigs. The alleles for black and white hair are B and b respectively while the alleles for short and long hair are S and s respectively.

Based on this question, two parents that are heterozygous for both genes (BbSs) are crossed (as seen in the attached punnet square). The guinea pigs that have an allelic pair of bb have white hair while those that have an allelic pair of SS or Ss have short hair as described in this question.

Using the punnet square attached,

- 4 out of 16 guinea pigs would have white hair because 4 offsprings possess the genotype bb for the first gene.

- 12 out of 16 guinea pigs would have short hair because 12 offsprings possess the genotype SS or Ss for the second gene.

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