Mati ng Phenotype ofParent # 1 4 Spotted/white 2 Spotted/white 3 Spotted/orange Spotted/orange Spotted/orange Genotype of Parent #1 Phenotype ofParent #2 Striped/orange Striped/orange Striped/white Striped/orange Striped/orange Genotype of Parent #2

Human Heredity: Principles and Issues (MindTap Course List)
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Author:Michael Cummings
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Chapter3: Transmission Of Genes From Generation To Generation
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4) 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 in the image attached.

a) Assign the letter “s” to the wing pattern gene and letter “w” to the background
color gene. Write in the capital letter for the dominant phenotype and the lower
case letter for the recessive phenotype. Also, write whether each allele is dominant (D)
or recessive (R).

Wing pattern gene:

Spotted 

- letter assignment:____

- dominant or recessive:____

Striped

- letter assignment:____

- dominant or recessive:____

Background color gene:

orange:

- letter assignment:____

- dominant or recessive:____

white:

- letter assignment:____

- dominant or recessive:_____

 

b) Based on the four matings in Question 4: 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 involved a separate set of parents, so the
4 matings involved 8 separate parents in total). Fill in the genotypes on the blank table image attached.

Mati
ng
1
3
4
Phenotype
4
ofParent #
2 Spotted/white
1
Spotted/white
Spotted/orange
Spotted/orange
Spotted/orange
Genotype
of Parent
#1
Phenotype
ofParent
#2
Striped/orange
Striped/orange
Striped/white
Striped/orange
Striped/orange
Genotype
of Parent
#2
Transcribed Image Text:Mati ng 1 3 4 Phenotype 4 ofParent # 2 Spotted/white 1 Spotted/white Spotted/orange Spotted/orange Spotted/orange Genotype of Parent #1 Phenotype ofParent #2 Striped/orange Striped/orange Striped/white Striped/orange Striped/orange Genotype of Parent #2
Mating Parental Phenotypes
1
2
3
4
spotted/white
x striped/orange
spotted/white
x striped/orange
spotted/orange x striped/ white
spotted/orange x striped/orange
Spotted Spotted Striped
/orange/white
/orange
128
122
0
0
623
131
0
Number of progeny
0
0
0
430
637
Striped
/white
133
812
422
0
Transcribed Image Text:Mating Parental Phenotypes 1 2 3 4 spotted/white x striped/orange spotted/white x striped/orange spotted/orange x striped/ white spotted/orange x striped/orange Spotted Spotted Striped /orange/white /orange 128 122 0 0 623 131 0 Number of progeny 0 0 0 430 637 Striped /white 133 812 422 0
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