1. If the diploid number of a giraffe cell is 64, how many chromosomes are in a

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Question

1. If the diploid number of a giraffe cell is 64, how many chromosomes are in a normal giraffe sperm cell?

2. Is the human egg or sperm cell haploid or diploid?

3. Consider an organism with a diploid number of 8

a. How many chromosomes are present in a cell during G1 of interphase?

b. How many sister chromatids are present in a cell during prophase?

c. How many chromosomes are present during metaphase II of meiosis?

d. How many sister chromatids are present in each cell during metaphase II of meiosis?

1. Here 2n = 64

and sperm cell will have half the no of chromosomes i.e n = 32.

2. Human egg or sperm cells are haploid (n=23).

3. Here 2n=8

a.No of chromosomes will remain the same i. 8 as in G1 phase only some proteins are synthesised and cell grows in size.

b.no of chromatids will be 16 because chromatid number will be equal to the DNA molecules per cell.

c.the number of chromosomes will be reduced to half of its original number during metaphase ii that is 4.

d.the number of sister chromatid will be 8.

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