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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 7, Problem 3QP
Textbook Problem
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The Human Reproductive System

A human female is conceived on April 1, 1979, and is born on January 1, 1980. Onset of puberty occurs on January 1, 1992. She conceives a child on July 1, 2004. How long did it take for the ovum that was fertilized on July 1, 2004, to complete meiosis?

Summary Introduction

To determine: The time taken by ovum that was fertilized on July 1, 2004, to complete meiosis.

Introduction: Humans reproduce by sexual reproduction where a male gamete called sperm, fuses with a female gamete called oocyte to produce a zygote. Gonads are the organs where the male and the female gametes are produced. The male gametes are produced with the help of male sex hormones called androgens and the female gametes are produced with the help of female sex hormones called estrogens. The process of production of zygote is referred to as fertilization.

Explanation of Solution

The process of meiosis begins before birth of an individual and is completed shortly after fertilization of the ovum. The given female parent was conceived on April 1, 1979, and was born on January 1, 1980. The given female parent then conceives on July 1, 2004. Thus, 24.5 years is the minimum time duration from January 1, 1980, the date on which the female parent was born to July 1, 2004, the date on which the female parent conceived, whereas the longest time is of 25...

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