1. How many chromosomes are in each cell at metaphase II in meiosis in humans? 4
ID: 219046 • Letter: 1
Question
1. How many chromosomes are in each cell at metaphase II in meiosis in humans?
4. In a diploid cell with 5 chromosome pairs (2n = 10), how many sister chromatids will be found in a nucleus at prophase of mitosis?
A.10 B.20 C.5 D.40
5. If there are 40 centromeres in a cell at anaphase of mitosis, how many chromosomes will be found in each daughter cell following cytokinesis?
A. 20 B.10 C.80 D.40
A. 46 duplicated chromosomes (23 sister chromatids) B. 23 duplicated chromosomes (46 sister chromatids) C. 25 duplicated chromosomes (50 sister chromatids) D. 46 duplicated chromosomes (96 sister chromatids)Explanation / Answer
1. Ans : B
Because in meosis I the chromosome duplicates from 23 to 46. Then each chromosome has two chromatids. In metaphase II of meiosis spindle fiber attaches to each chromosome. So we have 46 duplucated chromosome having 92 chromatids.
4. It has 10 chromosome hence 20 chromatids.
Ans: B
5. anaphase is the phase in which the chromosomes starts to move toward in opposite directiin. If 40 centromere means 40 each half had 20 centromere. Hence each daughtet had 20 chromosomes.
Ans: A
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