Genetics: A Conceptual Approach
Genetics: A Conceptual Approach
6th Edition
ISBN: 9781319050962
Author: Benjamin A. Pierce
Publisher: W. H. Freeman
Question
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Chapter 3.2, Problem 18AQP

a.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

Introduction:

The ABO blood group is determined by three alleles of gene I: IA,IB and i. The surface of red blood cells have specific surface antigens, either ‘A’ or ‘B’, which are encoded by gene I. The recessive allele i does not produce any surface antigen which forms blood group O (genotype ii). If gene I encode molecule A only, the person will have blood group A (genotype IAi or IAIA). If it encodes only molecule B, the person will have B blood group (genotype IBIB or IBi).

If gene I encode for both molecule A and B, it give rise to blood group type AB (genotype IAIB). Here both IA and IB alleles are equally or co-dominantly expressed to give rise to a new phenotype. The person with genotype IAIB will have both A and B molecules on red blood cell surface.

b.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

Introduction:

The ABO blood group is determined by three alleles of gene I: IA,IB and i. The surface of red blood cells have specific surface antigens, either ‘A’ or ‘B’, which are encoded by gene I. The recessive allele i does not produce any surface antigen which forms blood group O (genotype ii). If gene I encode molecule A only, the person will have blood group A (genotype IAi or IAIA). If it encodes only molecule B, the person will have B blood group (genotype IBIB or IBi).

If gene I encode for both molecule A and B, it give rise to blood group type AB (genotype IAIB). Here both IA and IB alleles are equally or co-dominantly expressed to give rise to a new phenotype. The person with genotype IAIB will have both A and B molecules on red blood cell surface.

c.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

Introduction:

The ABO blood group is determined by three alleles of gene I: IA,IB and i. The surface of red blood cells have specific surface antigens, either ‘A’ or ‘B’, which are encoded by gene I. The recessive allele i does not produce any surface antigen which forms blood group O (genotype ii). If gene I encode molecule A only, the person will have blood group A (genotype IAi or IAIA). If it encodes only molecule B, the person will have B blood group (genotype IBIB or IBi).

If gene I encode for both molecule A and B, it give rise to blood group type AB (genotype IAIB). Here both IA and IB alleles are equally or co-dominantly expressed to give rise to a new phenotype. The person with genotype IAIB will have both A and B molecules on red blood cell surface.

d.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

Introduction:

The ABO blood group is determined by three alleles of gene I: IA,IB and i. The surface of red blood cells have specific surface antigens, either ‘A’ or ‘B’, which are encoded by gene I. The recessive allele i does not produce any surface antigen which forms blood group O (genotype ii). If gene I encode molecule A only, the person will have blood group A (genotype IAi or IAIA). If it encodes only molecule B, the person will have B blood group (genotype IBIB or IBi).

If gene I encode for both molecule A and B, it give rise to blood group type AB (genotype IAIB). Here both IA and IB alleles are equally or co-dominantly expressed to give rise to a new phenotype. The person with genotype IAIB will have both A and B molecules on red blood cell surface.

e.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

Introduction:

The ABO blood group is determined by three alleles of gene I: IA,IB and i. The surface of red blood cells have specific surface antigens, either ‘A’ or ‘B’, which are encoded by gene I. The recessive allele i does not produce any surface antigen which forms blood group O (genotype ii). If gene I encode molecule A only, the person will have blood group A (genotype IAi or IAIA). If it encodes only molecule B, the person will have B blood group (genotype IBIB or IBi).

If gene I encode for both molecule A and B, it give rise to blood group type AB (genotype IAIB). Here both IA and IB alleles are equally or co-dominantly expressed to give rise to a new phenotype. The person with genotype IAIB will have both A and B molecules on red blood cell surface.

f.

Summary Introduction

To determine:

The most likely genotypes for the parents of each litter.

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