An animal has a diploid chromosome number of 40. Which of the following statements is FALSE?...
An animal has a diploid chromosome number of 40. Which of the following statements is FALSE?
a) there are 80 chromatids present during prophase of mitosis
b) there are 40 chromatids present during prophase II of meiosis
c) there are 40 chromosomes present in each cell at the end of mitosis
d) there are 20 homologous pairs
e) all of the above are true (I believe this is correct but I want to be certain)
Homework Answers
Answer: (e) All of the above are true.
Explanation:
* There will be 80 chromatids in prophase of mitosis, because during S-phase the chromosome number starts to double. Hence statement 'a' will be correct.
* Meiosis is a also known as reductional division. The chromosome number halves in meiosis I itself, however in the meiosis II there will be 20 chromosomes having 40 chromatids. Hence statement 'b' is also correct.
* After the end of mitosis as it is equational division, each cell will have diploid number that is 40 chromosomes. Hence statement 'c' is also correct.
* Each chromosome has its homologous pair, for 40 chromosomes in a diploid cell there will be 20 homologous pairs. Hence statement 'd' is also correct.
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