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each chromosome consists of only one centromere, but during certain times in the

ID: 89001 • Letter: E

Question

each chromosome consists of only one centromere, but during certain times in the cell cycle could consist of two DNA molecules (sister chromatids). If a cell in G1 of interphase had 8 chromosomes, answer the following questions

1) in G2 of interphase how many chromosomes will be found per cell?

2) in G2 of interphase how many DNA molecules will be found per cell?

3) in telophase 1 of meiosis how many chromosomes will be found per cell?

4) in telophase 1 of meiosis how many DNA molecules will be found per cell?

5) after cytokenisis of mitosis how many chromosomes will be found per cell?

6) after cytokenisis of meiosis 2 how many DNA molecules will be found per cell?

Options : 8, 16, 4

Explanation / Answer

If a cell in G1 of interphase had 8 chromosomes, answer the following questions

1) in G2 of interphase how many chromosomes will be found per cell?

8

2) in G2 of interphase how many DNA molecules will be found per cell?

16

3) in telophase 1 of meiosis how many chromosomes will be found per cell?

8

4) in telophase 1 of meiosis how many DNA molecules will be found per cell?

16

5) after cytokinesis of mitosis how many chromosomes will be found per cell?

8

6) after cytokinesis of meiosis 2 how many DNA molecules will be found per cell?

4

It is the DNA which will be doubled, so during G2 interphase, you will have the same number of chromosomes present in the original cell. During telophase 1 also, the number will be maintained the same. After cytokinesis, the number of chromosomes will be distributed equally. It is only after meiosis 2, the number of DNA molecules will be halved.

1) in G2 of interphase how many chromosomes will be found per cell?

8

2) in G2 of interphase how many DNA molecules will be found per cell?

16

3) in telophase 1 of meiosis how many chromosomes will be found per cell?

8

4) in telophase 1 of meiosis how many DNA molecules will be found per cell?

16

5) after cytokinesis of mitosis how many chromosomes will be found per cell?

8

6) after cytokinesis of meiosis 2 how many DNA molecules will be found per cell?

4