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प्रश्न
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
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
Name the following:
The part where the sperms are produced in the testes
Suppose a normal woman has never borne a child; How many mature eggs would she have produced in her lifetime? Your calculation should be based on two clues-
(a) Eggs are produced at the rate of 1 egg every 28 days (one menstrual cycle)
(b) A woman’s total reproductive period is 13 – 45 years.
State whether the following statement is true or false:
Fertilization occurs in the vagina.
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
Name (any one) hormone produced by the part labelled '2'.
The figure given below represents the female reproductive system of a mammal.
What will happen if the part B on both sides gets blocked?
Name two essential structures which take part in fertilization.
Differentiate
External fertilization and Internal fertilization.
Explain the term Cowper’s glands.
Complete the following sentences with appropriate word:
___________ hormones are secreted by the interstitial cells.
Complete the following sentences with appropriate word:
The process of releasing an egg from the ovary is called _________.
Complete the following sentences with appropriate word:
One egg is normally released from the ovary in the human females after
__________
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Sperm is a highly motile male gamete.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Vas deferens transports sperms into the urethra.
Write the functional activity of the following structure:
Seminal vesicles
Long answer question.
Describe the process of fertilization.
How can plants and animals save themselves from extinction?
Explain the process of fertilization.
What would be the effect if meiosis did not occur in nature?
In markets, eggs of birds are available but never eggs of dogs, why?
Name the three main regions of the human sperm, and briefly mention the function of each.
