Meiosis and Genetic Variation

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Questions and Answers

What is the primary purpose of meiosis?

To replicate DNA
To create haploid cells for sexual reproduction (correct)
To facilitate mitosis
To produce energy for cell division

Crossing over occurs during metaphase I of meiosis.

False (B)

Name one mechanism that promotes genetic variation during meiosis.

Crossing over between non-sister chromatids, random assortment of homologous chromosomes, or fusion of gametes.

The fusion of gametes from different ______ contributes to genetic variation.

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Match the following mechanisms with their descriptions:

<p>Crossing over = Exchange of genetic material between non-sister chromatids Random assortment = Independent distribution of homologous chromosomes Fusion of gametes = Combination of genetic material from two parents</p> Signup and view all the answers

Flashcards

Crossing Over

The exchange of genetic material between non-sister chromatids during meiosis I, resulting in new combinations of alleles.

Random Assortment

The random alignment of homologous chromosome pairs during metaphase I of meiosis, leading to different combinations of chromosomes in gametes.

Gamete Fusion

The process of two gametes, one from each parent, fusing to form a zygote.

Genetic Variation

The variety of genes and alleles within a population, which enhances the species' ability to adapt to changing environments.

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Meiosis

The production of haploid gametes (sperm and egg) from diploid cells through two rounds of cell division.

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Study Notes

Meiosis and Genetic Variation

Meiosis produces haploid cells for sexual reproduction
These haploid cells are genetically unique, increasing variation in offspring.

Mechanisms for Genetic Variation

Crossing over between non-sister chromatids during prophase I.
Random assortment of homologous chromosomes during metaphase I.
Fusion of gametes from different parents.

Outcome of Genetic Variation

Improved survival prospects for a species, promoting biodiversity.

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Description

This quiz explores the process of meiosis and its significance in sexual reproduction. Discover how genetic variation is achieved through crossing over, random assortment, and gamete fusion. Understand the role of these mechanisms in enhancing a species' survival and promoting biodiversity.