In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the surviving offspring of a cross between a male that is heterozygous for the lethal allele and a normal female? a. 2:1 male to female b. 1:2 male to female c. 1:1 male to female d. 4:3 male to female e. 3:1 male to female
In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the surviving offspring of a cross between a male that is heterozygous for the lethal allele and a normal female? a. 2:1 male to female b. 1:2 male to female c. 1:1 male to female d. 4:3 male to female e. 3:1 male to female
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter8: Patterns Of Inheritance
Section: Chapter Questions
Problem 9RQ: What is the reason for doing a test cross? a. to identify heterozygous individuals with the dominant...
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