U5L1

Both mitosis and meiosis begin with a parent cell that is diploid. Which of the following best describes how mitosis and meiosis result in daughter cells with different numbers of chromosomes?

• In mitosis, the chromosomes consist of a single chromatid, which is passed to two haploid daughter cells. In meiosis, the chromosomes consist of two chromatids during the first round of division and one chromatid during the second round of division, resulting in two haploid daughter cells.

• In mitosis, synapsis of homologous chromosomes results in four haploid daughter cells after one division. In meiosis, synapsis of homologous chromosomes occurs during the second division and results in four diploid daughter cells.

• Mitosis produces one identical daughter cell after one round of division. Meiosis has two rounds of division and doubles the number of chromosomes in the second round of division, producing four diploid cells.

• Mitosis produces two identical diploid daughter cells after one round of division. Meiosis produces four haploid daughter cells after two rounds of division.

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Label the following steps of Mitosis

a

b

c

d

f

e

Cytokinesis

Metaphase

Anaphase

Interphase

Telophase

Prophase

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Identify the stages of Meiosis I

e

d

c

b

a

Prophase I

Interphase

Metaphase I

Anaphase I

Telophase I

Identify the stages of Meiosis II

a

b

c

d

Prophase II

Metaphase II

Telophase II

Anaphase II

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

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NGSS.MS-PS4-1

What process does a multi-cellular organism use to replace its damaged body cells?

• mitosis

• meiosis

• replication

• transcription

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At the end of Mitosis, how many cells are there?

• 1

• 2

• 3

• 4

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NGSS.HS-LS1-4

This image shows chromosomes during Prophase 1. Which of the following correctly describes the process shown?

• segregation of sister chromatids

• condensation and segregation of alleles

• mutationin which the DNA content of the gene is altered

• crossing - over in which genes are exchanged

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NGSS.HS-LS3-2

Table 1 shows the stage and number of cells and chromosomes per cell at the end of the stage in a  2n=24  organism. Which of the following statements correctly describes the chromosomes in each daughter cell at the end of meiosis  I ?

• Each daughter cell contains 12 chromatids. Each chromatid is one of two from a single chromosome with the other one of the pair found in the other daughter cell.

• Each daughter cell contains 12 chromosomes, each composed of two chromatids. Since the chromosomes were randomly divided, one daughter cell may contain both of a pair of homologous chromosomes, while the other cell contains both of another pair of homologous chromosomes.

• Each daughter cell contains 12 chromosomes, each composed of two chromatids. Each chromosome is one of a pair of homologous chromosomes from the parent cell, with the other homologue found in the other daughter cell.

• Each daughter cell contains 24 separate chromatids. Since every two chromatids were originally joined, forming one homologous chromosome, the number of chromatids is divided by two to determine the number of chromosomes.

What is the purpose of Mitosis?

• Growth of an organism and Repair of damaged tissue

• To help the body get rid of extra cells

• To increase the amount of classwork you have to do

• To get rid of the nucleus

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