Question

Question 29:
In a human, how many chromosmes are present in :
(a) a brain cell ?
(b) a sperm in the testes ?
(c) an egg which has just been produced by the ovary ?
(d) a skin cell ?
(e) a fertilised egg ?

Lakhmir Singh Biology Class 10

Answer 1

In human
A) brain cell has 46 chromosomes
B) sperm in the testes has 23 chromosomes.
C) an egg which has just been produced by the ovary has 23 chromosomes.
D) a skin cell has 23 chromosomes

E) A fertilised egg called Zygote is union of sperm and egg so has 23 +23=46 chromosomes.

Hope it helps.

Thanks.

Answer 2

HEY!!

a) 46 chromosomes
b) 23 chromosomes
c) 23 chromosomes
d) 23 chromosomes
e) 46 chromosomes