Fertilization and Genetic Variation

In the process of meiosis...

• 1 haploid cell divides to form 2 diploid cells

• 1 haploid cell divides to form 4 diploid cells

• 1 diploid cell divides to form 2 haploid cells

• 1 diploid cell divides to form 4 haploid cells

What is the purpose of meiosis?

• Make 4 cells identical to the parent cell

• Make 4 genetically different cells with half the chromosomes of the parent cell

• Make 2 cells with half the chromosomes of the parent

• Make 2 cells identical to the parent cell

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NGSS.HS-LS3-2

What are some examples of haploid cells

• nerve cells

• blood cells

• sex cells (gametes)

• muscle cells

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When genetic information is swapped from one homologous chromosome to another during meiosis

• Crossing over

• Independent assortment

• Meiosis

• Cell Division

Meiosis produces haploid cells

• True

• False

A normal body cell of an animal has 20 chromosomes. How many chromosomes will its gametes have?

• 5

• 10

• 20

• 40

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Is the following cell diploid or haploid?

• Diploid

• Haploid

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NGSS.HS-LS3-2

What is the process shown in the diagram above? 

• mitosis
• cytokinesis
• Crossing Over

• Prophase II

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Some variation must be present in a population in order for natural selection to take place. These variations arise from mutations in the DNA and

• sorting of chromosomes during sexual reproduction
• combining of chromosomes during organ development
• changing of chromosomes during cloning
• removal of chromosomes during selective breeding

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NGSS.HS-LS3-2

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