Question

The diagram represents gametes P and Q fusing to give cell R. This cell then produces gametes S.T.U and V.
Which statement about the numbers of chromosomes in the cells and gametes is corrected.
A. The numbers of chromosomes in P and Q are different.
B. The numbers of chromosomes in P and Q are the same.
C. The numbers of chromosomes in S in one-quarter of chromosomes in
D. The numbers of chromosomes in T is half the member of chromosomes in Q

Answer 1

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The correct answer is:

B) The numbers of chromosomes in P and Q are the same.

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In case of human beings, the gametes have half number of chromosomes that is only 23 chromosomes where as a normal cell in our body has 46 chromosomes or 23 pairs of chromosomes.

The gametes fuse to form a zygote, further forming an organism, whose normal cells will have again 46 chromosomes or 23 pairs of chromosomes, but still we will have only 23 chromosomes in all the gamets he produce.

So, it can be said that chromosomes present in P, Q and S, T, U, V will be the same, in case of human being it will be 23 chromosomes.

$\rule{200}2$

Now, let us have a look what are chromosomes.

Chromosomes are the thread like structure present in the nucleus of a cell in an organism which carries genes. It is made up of deoxyribonucleic acid.

$\rule{200}4$

Answer 2

Answer:

The answer is option (b):-

                  ⇒The numbers of chromosomes in P and Q are the same.(23 pairs of chromosomes...)