Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Chapter 19, Problem 7TY

Summary Introduction

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Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Which of the following does not have an environmental factor thataffects the distribution of the phenotype? a. phenylketonuria c. heightb. skin color d. Marfan syndrome

In humans, the genetic disease cystic fibrosis is caused by a recessive allele (a). The normal (healthy) allele is dominant (A). What is the genotype of someone who has cystic fibrosis? What are the two different genotypes that a healthy person could have? If two people were both heterozygous for the cystic fibrosis gene, what fraction of their children would be likely to have this disease? Hint: Draw a Punnett square to figure it out.

Phenylketonuria (PKU) is a human hereditary disease resulting from the inability of the body to process the chemical phenylalanine, which is contained in the protein we eat. PKU is manifest in early infancy and, if it remains untreated, generally leads to cognitive impairment. PKU is caused by a recessive allele with simple Mendelian inheritance. A couple intends to have children but consults a genetic counselor because the man has a sister with PKU and the woman has a brother with PKU. There are no other known cases in their families. They ask the genetic counselor to determine the probability that their first child will have PKU. What is this probability?

Answer 2

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Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Answer 3

Question

Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Answer 4

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Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Answer 5

Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Answer 6

Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Answer 7

Chapter 19, Problem 7TY

Summary Introduction

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Answer 8

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Ch. 19 - If you might be a carrier of a gene for an...Ch. 19 - Prob. 2QC Ch. 19 - Prob. 1CR Ch. 19 - Prob. 2CR Ch. 19 - 3. Distinguish between genotype and phenotype. Ch. 19 - Describe the contributions of Mendel to the field...Ch. 19 - Explain how alterations of chromosome number and...Ch. 19 - Prob. 6CR Ch. 19 - Prob. 7CR Ch. 19 - Describe what is meant by sex-linked inheritance.

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Solution Summary: The author concludes that sickle cell anemia is not a polygenic trait and is influenced by multiple alleles and genes.

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Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

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Chapter 19 Solutions

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Solution Summary: The author concludes that sickle cell anemia is not a polygenic trait and is influenced by multiple alleles and genes.

Concept explainers

Videos

Introduction: Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.

Want to see the full answer?

Chapter 19 Solutions

Introduction:

Traits that are governed by the interaction of different alleles and genes, those traits are termed as polygenic. In this case, there is no concept of complete dominance. All the genes contribute equally to a trait.