A make believe organism has 10 chromosomes for each of its body cells. Cells are continuously being rubbed off and replaced. The diploid number (2N) for this organism is .....

REPRODUCTION IN ORGANISMS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A make believe organism has 10 chromosomes for each of its body cells. Cells are continuously being rubbed off and replaced. The diploid number (2N) for this organism is ____

A	10
B	20
C	40
D	5

Explanation:

Detailed explanation-1: -Answer and Explanation: An organism with a diploid chromosome number of 10 will duplicate the chromosomes during interphase to form 20 sister chromatids. Each of the duplicated chromosomes will exist as two sister chromatids joined together by their centromere.

Detailed explanation-2: -The diploid chromosome number is 10. So, the haploid chromosome number will be= 10/2= 5. The number of possible chromosome pairs is given by= 2n, where n is the haploid chromosome number. So, the number of chromosome pairs for having a diploid chromosome number of 10 will be= 25.

Detailed explanation-3: -Correct answer is option b) 20. Explanation: If the egg cell has 10 chromosomes (haploid ‘n’), then the number of chromosomes present in diploid cell (2n) is 20.

Detailed explanation-4: -Answer and Explanation: If an organism has a diploid number of 10 it has 10 chromosomes-5 homologous pairs. It will therefore 20 chromatids, all of which will be present in prophase. Mitosis creates two diploid daughter cells from a diploid mother cell.

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