Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 20, Problem 9SQ
Textbook Problem

New flu strains can arise by ___ .

  1. a. meiosis
  2. b. mitosis
  3. c. viral reassortment
  4. d. binary fission

Summary Introduction

Introduction: Reassortment is the integration of genome of a species into new arrangements in unrelated individuals. It occurs in viruses for the arousal of some new viral agents. Different processes are involved in the viral reassortment that involves mixing of the genetic materials. This process primarily occurs when the two different viruses infect the same cell. Thereby, they exchange their genetic material, and new forms of viruses (flu strains) are formed. An example is viral reassortment in influenza viruses.

Explanation of Solution

Reasons for correct answer:

Viruses that infect same cells exchange their genetic material and form new strains of viruses. This process is called as viral reassortment.

Option c. is given as “viral reassortment”. New flu strains emerge due to the viral reassortment of influenza viruses infecting same cells.

Hence, the correct answer is option c.

Reason for incorrect answers:

Option a. is given as “meiosis”. Meiotic division is a division that occurs in a cell that typically lessens the number of chromosomes present in its parent cell by half. A diploid parent cell (2n) is used for the production of four haploid cells (n). Meiotic division occurs mainly in the reproductive cells (egg and sperm). When the haploid sex cells fuse together to form a particular distinct cell, it restores the diploid condition of the cell (zygote). Meiosis normal cell division in sexually reproducing organisms is unrelated with the viral reassortment...

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