Meiosis and Mitosis Review Ch 9

Front

What is meiosis?

Back

Meiosis is a form of sexual reproduction that results in the formation of gametes (sperm and eggs) with half the number of chromosomes.

Front

What is the diploid number of chromosomes if the haploid (n) number is 5?

Back

The diploid number is 10, calculated as 2n.

Front

What is the general shape of DNA?

Back

The general shape of DNA is a double helix.

Front

How many divisions occur in meiosis?

Back

There are 2 divisions in meiosis.

Front

What is the thread-like material that DNA starts out as?

Back

DNA starts out as chromatin.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis results in four genetically diverse gametes.

Front

What is the role of chromatin in the cell?

Back

Chromatin packages DNA into a compact, dense shape, allowing for efficient storage and regulation of gene expression.

Front

What are homologous chromosomes?

Back

Homologous chromosomes are pairs of chromosomes, one from each parent, that are similar in shape, size, and genetic content.

Front

What is crossing over in meiosis?

Back

Crossing over is the exchange of genetic material between homologous chromosomes during prophase I of meiosis, increasing genetic diversity.

Front

What is the significance of the haploid number in sexual reproduction?

Back

The haploid number ensures that when gametes fuse during fertilization, the resulting zygote has the correct diploid number of chromosomes.