Each chromosome conists of only one centromere but during ce

Each chromosome conists 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 has 16 chromosomes answer the following questions

In G2 of interphase how many chromosomes will be found per A 16 Cell? B. 16 In G2 of phase how many DNA molecules will be found per c. cell? D. 16 In teleophase l of meiosis how many chromosomes will be found E. 16 per cell? In meiosis how many DNA molecules will be foun 32 teleophase l of er cell? After cytokinesis of mitosis how many chromosomes will be found per cell? After cytokinesis of mitosis how many DNA molecules will be found per cell?

Solution

1.In G2 of interphase :Number of chromosomes found per cell will be :E. 16.

Reason: Number of chromosomes is the same as two sister chromatids are attached to a single centromere.

2.In G2 of interphase:Number of DNA molecules found per cell will be:F.32

Reason: Chromosomes split into sister chromatids.16 chromosomes =32 chromatids = the number of DNA molecules.

3.In telophase of meiosis I: Number of chromosomes found per cell will be: C.8

Reason: Cells divide to form 2 cells and so chromosomes become half i.e 16/2 =8

4.In telophase of meiosis I:Number of DNA molecules found per cell will be :D. 16

Reason:Chromosomes are in form of chromatids.So 8*2 =16 chromatids = 16 DNA molecules.

5.After cytokinesis of mitosis, number of chromosomes per cell will be :A. 16

Reason:Each cell will receive same number of chromosomes as that in the start of mitosis.

6.After cytokinesis number of DNA molecules per cell will be : B.16

Reason: After cytokinesis cells will enter into G1 phase of interphase.