Microbiology with Diseases by Taxonomy (5th Edition)
Microbiology with Diseases by Taxonomy (5th Edition)
5th Edition
ISBN: 9780134019192
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 12, Problem 1MC
Summary Introduction

Introduction:

Ploidy means the number of chromosomes. The ploidy of the cell will indicate how many set of chromosomes or genetic information the cell has. Three different types of ploidy are diploid haploid and polyploid.

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Answer to Problem 1MC

Correct answer:

Haploid nuclei contain one set of chromosomes. Therefore, option (a) is correct.

Option (a) is given as “contain one set of chromosomes”.

Explanation of Solution

Justify reasons for the correct statement:

When a cell has a single set of chromosomes in its nuclei, it is known as a haploid cell. The haploid gamete will be produced by a living organism, which combines to form a zygote that is diploid in nature.

Hence, option (a) is correct.

Justify reasons for the incorrect statements:

Option (b) is given as “contain two sets of chromosomes”.

Diploid cells are those cells that have two set of chromosomes. So haploid cell will never have two sets of chromosome. Hence, it is a wrong answer.

Option (c) is given “contain half a set of chromosomes”.

Haploid nuclei will never have half set of chromosome because in haploid cell, one set of chromosome is present. Hence, it is a wrong answer.

Option (d) is given “are found in the cytosol of eukaryotic organism”.

A haploid nucleus is found in intracellular fluid, but not in cytosol of eukaryotic organism. Hence, it is a wrong answer.

Hence, options (b) (c) and (d) are incorrect.

Conclusion

Haploid nature of nucleus denotes that it has only one set of chromosomes. Generally gametes have one set of chromosomes.

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Microbiology with Diseases by Taxonomy (5th Edition)

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