1) List and briefly describe three major cell cycle checkpoints. For each checkpoint,predict the consequences if the checkpoint fails to work properly. 2) Explain why mitosis does not produce genetic variation and how meiosis leads to the production of tremendous genetic variation.

1) List and briefly describe three major cell cycle checkpoints. For each checkpoint,predict the consequences if the checkpoint fails to work properly. 2) Explain why mitosis does not produce genetic variation and how meiosis leads to the production of tremendous genetic variation.

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter18: Cell Reproduction

Section: Chapter Questions

Problem 4RQ: Name the four main stages of mitosis, and describe what happens in each stage.

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Concept explainers

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:

Question

Definition Definition Genetic variation refers to the differences in DNA sequence among individuals of the same species. These variations can occur due to mutations, genetic recombination, and natural selection. Genetic variation plays an important role in evolution, as it allows for the selection of traits that enhance the survival and reproduction of organisms in changing environments.

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