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 70P

A.

Summary Introduction

To determine: The pedigree for the given condition.

Introduction: Galactosemia is a limited genetic metabolic disease that influences the capacity of an individual to metabolize the sugar galactose accurately.

B.

Summary Introduction

To determine: The probability that this child will have galactosemia.

Introduction: Galactosemia is an autosomal recessive disease. An autosomal illness is a condition that does not depends on the sex chromosomes. If two people who possess galactosemia have children, all of them will have galactosemia.

C.

Summary Introduction

To determine: If the first child has galactosemia, the probability that a second child will also be having the same condition.

Introduction: An autosomal recessive disorder indicates both copies of the gene in every cell need to hold the mutation for a person to exhibit indications. The parents of an affected person typically bear one copy of the abnormal gene, though they do not show symptoms of galactosemia.

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Salim and Sara are contemplating having children, but Salim’s brother has galactosemia and Sara’s great-grandmother also had galactosemia. Sara has a sister who has three children, none of whom is affected.a.     Construct a genetic pedigree for this family showing the possible genotype of each member.b.    What is the probability that Salim and Sara’s first child will have galactosemia? Explain your calculations.
a.  The pedigree follows the inheritance of a relatively common trait.  Is the trait most likely autosomal dominant, autosomal recessive, X-linked dominant, or X-linked recessive? Explain your reasoning. b. If the couple marked with a “*” had another child, what is the probability that it would be an affected daughter? (Note:  this is a compound outcome.)
Pompe disease is a glycogen storage disorder caused by a lack of ⍺-glucosidase, the enzyme that converts glycogen to glucose in the muscles. Babies born with this disorder die by the age of two. pope disease is a genetic disorder caused by the presence of two recessive autosomal alleles. A. A man and a woman heterozygous for the condition have two female unaffected children. Determine, using a Punnett square, the probability, expressed as a whole number percentage, of a fourth baby being born a male with Pompe disease. B. Iftheman,fromthepreviousquestion,hadtypeAbloodandthewomanhadtypeO blood, what would be probability of them having a daughter with type O blood and affected with Pompe disease? (Show clearly your calculations and express your answer as a frequency between 0 - 1 and rounded to 2 decimal places)

Chapter 2 Solutions

Introduction to Genetic Analysis

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How to solve genetics probability problems; Author: Shomu's Biology;https://www.youtube.com/watch?v=R0yjfb1ooUs;License: Standard YouTube License, CC-BY
Beyond Mendelian Genetics: Complex Patterns of Inheritance; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-EmvmBuK-B8;License: Standard YouTube License, CC-BY