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Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
ISBN: 9781305112100

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BuyFindarrow_forward

Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
ISBN: 9781305112100
Textbook Problem

Adam’s maternal and paternal chromosomes have alternate forms of a gene that influences whether a person is right-handed or left-handed. One form says “right” and its partner says “left.” Visualize one of Adam’s spermatogonia, in which chromosomes are being duplicated prior to meiosis. Visualize what happens to the chromosomes during anaphase I and II. (It might help to use toothpicks as models of the sister chromatids of each chromosome.) What fraction of Adam's sperm will carry the gene for right-handedness? For left-handedness?

Summary Introduction

To visualize: Person A’s spermatogonia in which chromosomes are being duplicated prior to meiosis.

Introduction: In the process of cell division, the chromatin present in the nucleus shrinks and forms a thread-like structure called the chromosomes. Meiosis is a type of cellular reproduction by which the chromosome number is reduced to half and produces four haploid cells.

Explanation

It is assumed that the right-handed gene is denoted as R and left-handed gene is denoted as r...

Summary Introduction

To visualize: The changes in the chromosomes of Person A during anaphases I and II of meiosis.

Introduction: In the process of cell division, the chromatin present in the nucleus shrinks and forms a thread-like structure called the chromosomes. Meiosis is a type of cellular reproduction by which the chromosome number is reduced to half and produces four haploid cells.

Summary Introduction

To determine: The fraction of person A’s sperm that will carry the gene for right-handedness.

Introduction: In the process of cell division, the chromatin present in the nucleus shrinks and forms a thread-like structure called the chromosomes. Meiosis is a type of cellular reproduction by which the chromosome number is reduced to half and produces four haploid cells.

Summary Introduction

To determine: The fraction of person A’s sperm that will carry the gene for left-handedness.

Introduction: In the process of cell division, the chromatin present in the nucleus shrinks and forms a thread-like structure called the chromosomes. Meiosis is a type of cellular reproduction by which the chromosome number is reduced to half and produces four haploid cells.

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