Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 2, Problem 29P
In the fruit fly Drosophila melanogaster, the following genes and mutations are known:
Wing size: recessive allele for tiny wings t; dominant allele for normal wings T.
Eye shape: recessive allele for narrow eyes n; dominant allele for normal (oval) eyes N.
For each of the four following crosses, give the genotypes of each of the parents.
Male | Female | |||||
Wings | Eyes | Wings | Eyes | Offspring | ||
1 | Tiny | Oval | X | Tiny | Oval | 78 tiny wings, oval eyes |
24 tiny wings, narrow eyes | ||||||
2 | Normal | Narrow | X | Tiny | Oval | 45 normal wings, oval eyes |
40 normal wings narrow eyes | ||||||
38 tiny wings, oval eyes | ||||||
44 tiny wings narrow eyes | ||||||
3 | Normal | Narrow | X | Normal | Oval | 35normal wings oval eyes |
29 normal wings, narrow eyes | ||||||
10 tiny wings, oval eyes | ||||||
11 tiny wings, narrow eyes | ||||||
4 | Normal | Narrow | X | Normal | Oval | 62 normal wings, oval eyes |
19 tiny wings, oval eyes |
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Chapter 2 Solutions
Genetics: From Genes to Genomes
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