CAMPBELL BIOL V2 W/ MAST BIOL >CI<
CAMPBELL BIOL V2 W/ MAST BIOL >CI<
18th Edition
ISBN: 9781323782538
Author: Reece
Publisher: PEARSON
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Chapter 14.4, Problem 3CC
Summary Introduction

To determine: The genotype of “Person J” who has polydactyly.

Concept introduction:

Extra digits can be present in either fingers or toes. It is a physical anomaly that is known as polydactyly. It is an autosomal dominant trait.

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Joan was born with six toes on each foot, a dominanttrait called polydactyly. Two of her five siblings and hermother, but not her father, also have extra digits. Whatis Joan’s genotype for the number-of-digits character?Explain your answer. Use D and d to symbolize the allelesfor this character.
Two healthy parents have a child who is later diagnosed with cystic fibrosis. What is the genetic term for this kind of disease? Using Mendel’s pattern, pick a letter for this gene and give the genotypes of the parents and the child. What are the odds that their next child will also have cystic fibrosis?
Joan was born with 6 toes on each foot, a dominant trait called polydactyly. Two of her 5 siblings and her mother but not her father also have extra digits. What is Joan’s genotype for the number of digits character? Explain your choice. Use D and d symbolize the alleles for this character.

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CAMPBELL BIOL V2 W/ MAST BIOL >CI<

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