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प्रश्न
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
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उत्तर
- Sexual reproduction involves two parents i.e. male parent and female parent.
- The male gamete coming from a male parent fuses with a female gamete of a female parent to form a zygote which develops into an embryo and then into a new individual.
Thus, the new individual always has the recombined genes of both the parents.
संबंधित प्रश्न
State whether the following statement is true (T) or false (F):
The plumule of an embryo gives rise to the root system.
Define the Zygote.
Name the following:
The part where the sperms are produced in the testes
Given below is a portion of the diagram to show the diagrammatic highly magnified view of a single human sperm. Complete the diagram to show its normal structure.
State whether the following statement is true or false:
Fertilization occurs in the vagina.
State whether the following statement is true or false:
Gestation in humans is completed in about 380 days.
Give appropriate term of the following:
The attachment of developing zygote (blastocyst) on the uterine wall.
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
How many days does the foetus take to be fully developed?
Where does fertilization occur?
How is the fetus protected?
Explain the term Cowper’s glands.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Give Technical Term:
Rupture of the follicle and release of the ovum from the ovary.
Give Technical Term:
In how many weeks fetus development is completed?
Complete the following sentences with appropriate word:
___________ hormones are secreted by the interstitial cells.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Fertilization is the product of the egg nucleus and the sperm nucleus.
Describe the process of fertilization.
Fertilization of the ovum generally takes place in the ______.
Match the pair:
| 'A' | 'B' | ||
| (1) | Male | (a) | 44 + XX |
| (b) | 44 + XY | ||
| (c) | 44 + YY |
