Lesson 28: Meiosis

Crossing over is -

• a cell division that produces four haploid cells

• a cell division that produces two diploid cells

• a process by which homologous chromosomes exchange segments of DNA

• a process that produces two daughter cells

Tags

NGSS.HS-LS3-2

Gametes, or sex cells, are formed by __________, while other eukaryotic cells are formed by mitosis.

Tags

NGSS.HS-LS3-2

Select all statements below that correctly compare mitosis and meiosis.

• Mitosis produces sex cells, and meiosis produces all other cells

• Mitosis has one division, and meiosis has two divisions

• Mitosis produces diploid cells, and meiosis produces haploid cells

• Mitosis produces two daughter cells, and meiosis produces four daughter cells

A paired set of homologous chromosomes formed during prophase one of meiosis is a -

• chromatid

• tetrad

• zygote

• chromosome

What is significant about the process of crossing over, which is when homologous chromosomes exchange DNA segments?

• It provides genetic variation among organisms

• It contributes to gene flow among populations

• It creates a complete set of chromosomes

• It eliminates genetic disorders in most organisms

Tags

NGSS.HS-LS3-2

If the haploid cell of an organism contains 10 chromosomes, then the diploid cells of an organism will each contain how many chromosomes?

• 10

• 15

• 5

• 20

Tags

NGSS.HS-LS3-2

The chromosomes look different after DNA replication because they are made up of two sister ______________.

Tags

NGSS.HS-LS1-4

When meiosis is complete, how many haploid cells have been produced from the original diploid cell?

• 3

• 4

• 1

• 2

During what phase of meiosis does crossing over occur?

• Prophase I

• Metaphase I

• Prophase II

• Metaphase II

A fertilized egg is called a -

• chromosome

• zygote

• sister chromatid

• gamete