Advertisements
Advertisements
प्रश्न
The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be:
विकल्प
28
14
56
42
Advertisements
उत्तर
14
Explanation:
A germ cell has 14 pairs of chromosomes, i.e., half the number of chromosomes present in the normal body cell of an organism.
संबंधित प्रश्न
State its functions in case of a pregnant human female.
What are the different methods of contraception?
Why are testes located outside the abdominal cavity? What is responsible for bringing about changes in appearance seen in boys at the time of puberty?
What are the female sex cells in humans called?
In human females, an event that indicates the onset of reproductive phase is :
(a) growth of body
(b) change in hair pattern
(c) change in voice
(d) menstruation
X and Y are two human beings. The organ A in the reproductive system of X releases a mature gamete B once a month which goes into a tube-like structure C through a funnel-like opening. The organ D in the reproductive system of Y makes and releases gametes E which pass through a duct F and are introduced by an organ of Y, into the body of X. B and E fuse together in C to form a new cell G. The cell G divides repeatedly to form a ball of cells H which gets embedded in the lining of organ I of reproductive system of X where it grows and develops into a baby.
(a) Name (i) organ A, and (ii) gamete B.
(b) Write two names of tube-like structure C.
(c) Name (i) organ D, and (ii) gamete E.
(d) Write two names of duct F.
(e) Name (i) cell G (ii) ball of cells H, and (iii) organ I.
(f) Out of X and Y, which one is (i) male, and (ii) female?
Write two examples of sexually transmitted diseases caused by bacteria.
Choose the correct answer:
Binary fission is a method of __________
What do you understand by an inguinal hernia?
Differentiate
Sexual Reproduction and Asexual Reproduction.
