Pigment in mouse fur is only produced when the C allele is present. Individuals of the cc genotype are white. If color is present, it may be determined by the A, a alleles. AA or Aa results in agouti color, while aa results in black coats.
(a) What F1 and F2 genotypic and phenotypic ratios are obtained from a cross between AACC and aacc mice?
(b) In three crosses between agouti females whose genotypes were unknown and males of the aacc genotype, the following phenotypic ratios were obtained:
(1) 8 agouti | (2) 9 agouti | (3) 4 agouti |
8 white | 10 black | 5 black |
|
| 10 white |
What are the genotypes of these female parents?
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