Introduction to Genetic Analysis
Introduction to Genetic Analysis
11th Edition
ISBN: 9781464109485
Author: Anthony J.F. Griffiths, Susan R. Wessler, Sean B. Carroll, John Doebley
Publisher: W. H. Freeman
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Chapter 2, Problem 48P
Summary Introduction

To determine: Whether an animal can be a carrier of the recessive allele (and not a heterozygous for the given gene).

Introduction: Heterozygosity and homozygosity are the two specific traits of a diploid individual, which can exhibit the traits present on the different locus on a chromosome. Homozygous character is defined as the same copies of the gene (such as AA and aa). However, heterozygous characters are the two different alleles for gene expression (such as A and other a)

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Albinism is caused by an autosomal recessive allele that interferes with skin pigmentation in mammals. Two normally pigmented human parents already have an albino boy.  They plan to continue to have children until they get a girl. Some or all of this information is important for each of the questions below.   a) What is the probability that their next child (currently unborn) will be a girl with albinism?  Explain your reasoning.    b) What is the probability their first female child will be albino?  Explain your reasoning. c)  The answer to part (b) is different (and, yes, the answer is different) from the answer to part (a). Explain why. (Hint: it has something to do with the underlined words.)
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Introduction to Genetic Analysis

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY