NEET BIOLOGY

REPRODUCTION

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. How many homologous pairs of chromosomes will this organism have?

A	1
B	2
C	4
D	5

Explanation:

Detailed explanation-1: -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. So, the correct answer is ‘25’.

Detailed explanation-2: -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.

Detailed explanation-3: -10 chromosomes each. Mitotic division results in two daughter cells with an identical chromosomal number and genetic content to the parental cell.

Detailed explanation-4: -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.

There is 1 question to complete.