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Given diagram shows variations in the am...

Given diagram shows variations in the amount of DNA of a developing eukaryote. What the arrow denotes?

A

First meiotic anaphase

B

Second meiotic anaphase

C

Mitotic anaphase

D

Mitotic telophase

Text Solution

Verified by Experts

The correct Answer is:
B
The given graph shows variations in the DNA content in the cells of a eukaryote. Hploid set of chromosomes 1C is present in gamete which on fertilisation with gamete of opposite sex acquires diploid set of chormosomes (2C) and transforms into embryo embryo develops and grows into diplid organism by multiple mitotic divisions. During sexual reproduction gamete formation takes place by meiotic divison under which amount of DNA (2C) increases to 4C during S phase, which in first meiotic divison reduces to half i.e., 2C, divided among two daughter cells wheresas chormosomal number reduces to half i.e., from 2n to n. During second meiotic division, the amont of DNA is further distriuted equally from each daughter cells from first meiotic division ) to two daughter cells. The second meiotic division is equational, therefore the number of chromosome remains the same as produced at the end of meiosis I. Thus at the end of meiosis-II, each of the four haploid daughter cells contains one copy of every chromosme in the set (1C), rather two.
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