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Meiosis and Cell Division

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Questions and Answers

What is the main purpose of meiosis in sexually reproducing organisms?

To increase the genetic diversity in offspring

To double the number of chromosomes in gametes

To maintain diploid cells in the organism

To reduce the number of chromosomes in gametes (correct)

How many rounds of division does a diploid cell undergo during meiosis?

One

Two (correct)

Three

Four

What is the consequence of a cell having extra chromosomes?

It has no impact on cell functioning

It leads to the formation of haploid cells

It can have substantial impacts on cell functioning (correct)

It helps in increasing genetic diversity

In humans, how many chromosomes are present in almost every body cell?

46 chromosomes Signup and view all the answers

What is the genetic composition of the egg and sperm that unite during fertilization?

Both are haploid with a single set of chromosomes Signup and view all the answers

Why is it important for each gamete to have exactly 23 chromosomes?

To avoid substantial impacts on cell functioning Signup and view all the answers

What is the chromosome count in a new human that grows from a fertilized egg?

46 chromosomes Signup and view all the answers

What characterizes the chromosome count in somatic cells of humans?

Diploid with two sets of chromosomes Signup and view all the answers

What is the significance of meiosis in maintaining the correct chromosome number?

It carefully counts and divides the chromosomes to ensure each gamete has the correct number of chromosomes. Signup and view all the answers

What distinguishes the genetic content of somatic cells in humans?

They are diploid, containing two sets of chromosomes from each parent. Signup and view all the answers

In what way does meiosis ensure the proper genetic composition of gametes?

By preventing any errors during cell division that could result in an incorrect chromosome count. Signup and view all the answers

What is the consequence of an incorrect number of chromosomes in a cell?

It can have substantial impacts on how the cell functions. Signup and view all the answers

Why is it crucial for each egg or sperm to have exactly 23 chromosomes?

To ensure that after fertilization, the resulting human has 46 chromosomes. Signup and view all the answers

What is the role of meiosis in sexually reproducing organisms?

To generate genetic diversity in offspring by mixing parental chromosomes. Signup and view all the answers

How does meiosis contribute to maintaining the genetic stability of a species?

By ensuring that gametes have a consistent number of chromosomes within a species. Signup and view all the answers

What is the outcome of combining an egg with 23 chromosomes with a sperm containing 23 chromosomes?

It produces a fertilized egg with a diploid chromosome count. Signup and view all the answers