Hemophilia A is caused by a sex-linked recessive gene in human and in dogs. a. What proportions (and sexes), among their offspring will be hemophiliacs if a  hemophilic male is mated to a homozygous nonhemophilic female? b. If a daughter produced by the mating in (a) is mated to a normal male, what  proportions and (sexes) will be hemophilic among their offspring?

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
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Chapter10: From Proteins To Phenotypes
Section10.7: Defects In Transport Proteins: Hemoglobin
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Hemophilia A is caused by a sex-linked recessive gene in human and in dogs.


a. What proportions (and sexes), among their offspring will be hemophiliacs if a 
hemophilic male is mated to a homozygous nonhemophilic female?
b. If a daughter produced by the mating in (a) is mated to a normal male, what 
proportions and (sexes) will be hemophilic among their offspring?

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