Human Heredity: Principles and Issues (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 3, Problem 36QP

a.

Summary Introduction

To determine: The possible phenotypes and their ratios for the cross between the parents HhAB × HhAB.

Introduction: The human blood group is an example of codominance where the alleles for the two antigens A and B are equally dominant. It means that when the two antigens A and B are present, the blood group is AB whereas in the absence of both the antigens, the blood group is O.

b.

Summary Introduction

To determine: The genotype of the individuals with blood group O.

Introduction: The individuals with the blood group O lack the surface antigens for both the blood groups A and B. Therefore, the expression of type O blood group occurs when the individual inherits both the recessive alleles. It makes  people with type O blood group to become universal donors.

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Blood types in humans are Codominant. a. What are the possible genotypes of someone with type O blood? b. What are the possible genotypes of someone with type B blood? c. What is the phenotype of someone’s whose genotype is AO? d. A man with AB blood is married to a woman with AB blood. What blood types will their children be and in what proportion?
. Assuming no involvement of the Bombay phenotype(in case you’ve already read ahead to Section 3.2):a. If a girl has blood type O, what could be the genotypes and corresponding phenotypes of her parents?b. If a girl has blood type B and her mother has bloodtype A, what genotype(s) and correspondingphenotype(s) could the other parent have?c. If a girl has blood type AB and her mother is alsoAB, what are the genotype(s) and correspondingphenotype(s) of any male who could not be thegirl’s father?
Monohybrid Cross: 1) In dogs, wire hair (S) is dominant to smooth (s). a. In a cross between a homozygous wire-haired dog with a smooth haired dog what are the genotypes and phenotypes of the F1 generation? b. If a brother and sister from the F1 generation are crossed what is the expected ratio of wire-haired to smooth-haired dogs produced from this cross?

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Human Heredity: Principles and Issues (MindTap Course List)

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