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प्रश्न
Sketch and label human female reproductive system.
Is the woman responsible for sex-determination of child? Justify your answer.
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उत्तर
Woman is not responsible for sex-determination. Man produces two types of sperms as 22+X or 22+Y, whereas woman produces only 22+X types of ova. Female embryo is produced by union of 22+X sperm and 22+X ovum. Male embryo is produced by union of 22+Y sperm and 22+X ovum. Thus, sex of the embryo depends upon sperms of man.
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संबंधित प्रश्न
Write the functions of the following organs of reproduction:
a. Ovaries
b. Seminal vesicle and prostate glands
Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
The structure formed by the villi of the embryo and the uterus of the mother.
Which part of the human body produces sperms?
For how much time does menstruation last in human females (or women)?
What is the frequency of menstrual cycle in human females (or women)?
Write the names of male sex hormone?
Draw a labelled diagram of the human male reproductive system. With the help of this diagram, describe the working of human male reproductive system?
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?
Rewrite the terms in the correct order so as to be in a logical sequence.
Implantation, ovulation, child birth, gestation, fertilisation.
List two changes observed in girls at the time of puberty.
In humans, ______ chromosome is responsible for maleness.
Give the names:
Any two sexual diseases.
What is reproduction? List its two types.
Define the following:
Asexual reproduction
Differentiate on the basis of what is indicated in brackets :
The prostate gland and Cowper’s gland (the nature of secretion)
Choose the Odd One Out:
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will NOT be transported form ______
Mention any two changes that are common to both boys and girls in early teenage years.
