In frost moths, two alleles of one gene determine the character difference of spotted versus striped wings and two alleles of a separate, independent gene determine the character difference of orange wing background versus white wing background. The results for four matings of moth phenotypes are shown below. Number of progeny Mating Parental Phenotypes Spotted/orange Spotted/white Striped /orange Striped /white 1 spotted/orange x striped/orange 623 0 637 0 2 spotted/white x striped/orange 0 0 0 712 3 spotted/white x striped/orange 122 131 128 133 4 spotted/orange x striped/white 0 0 430 422 striped= S(dominant) spotted=s (recessive) white= W(dominant) orange=w (recessive) What are the genotypes of each parent in each cross? If more than one genotype is possible, list the alternative possibilities. (Remember that each mating involves a separate set of parents, so the 4 matings involve 8 separate parents in total). Mating Phenotype of Parent # 1 Genotype of Parent #1 Phenotype of Parent #2 Genotype of Parent #2 1 Spotted/orange Striped/orange 2 Spotted/white Striped/orange 3 Spotted/white Striped/orange 4 Spotted/orange Striped/white
In frost moths, two alleles of one gene determine the character difference of spotted versus striped wings and two alleles of a separate, independent gene determine the character difference of orange wing background versus white wing background. The results for four matings of moth
Number of progeny |
|||||
Mating |
Parental Phenotypes |
Spotted/orange |
Spotted/white |
Striped /orange |
Striped /white |
1 |
spotted/orange x striped/orange |
623 |
0 |
637 |
0 |
2 |
spotted/white x striped/orange |
0 |
0 |
0 |
712 |
3 |
spotted/white x striped/orange |
122 |
131 |
128 |
133 |
4 |
spotted/orange x striped/white |
0 |
0 |
430 |
422 |
striped= S(dominant)
spotted=s (recessive)
white= W(dominant)
orange=w (recessive)
What are the genotypes of each parent in each cross? If more than one genotype is possible, list the alternative possibilities. (Remember that each mating involves a separate set of parents, so the 4 matings involve 8 separate parents in total).
Mating |
Phenotype of Parent # 1 |
Genotype |
Phenotype of Parent #2 |
Genotype |
1 |
Spotted/orange |
Striped/orange |
||
2 |
Spotted/white |
Striped/orange |
||
3 |
Spotted/white |
Striped/orange |
||
4 |
Spotted/orange |
Striped/white |
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