Human Biology
Human Biology
15th Edition
ISBN: 9781259689796
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 19.6, Problem 1LO
Summary Introduction

To explain:

The production of monosomy and trisomy chromosome conditions by the nondisjunction.

Introduction:

The condition, in which homologous chromosomes does not separates accurately during the division of cell is called nondisjunction. The nondisjunction can occur in three ways in the cells, failure in segregation of homologous chromosomes during mitosis, meiosis I (first meiotic division), and meiosis II (second meiotic division).

Pictorial representation:

The Fig. 1 represents the production of monosomy and trisomy chromosome conditions by nondisjunction are as follows:

Human Biology, Chapter 19.6, Problem 1LO

Fig. 1: Represents the trisomy and monosomy occurring due to nondisjunction.

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