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प्रश्न
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
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उत्तर
In sexual reproduction, the offspring inherits genetic material from both parents. Therefore, the newborn shows similarities in various characteristics with its parents. These inherited characteristics are transmitted through genes present on chromosomes.
For example:
- A child may have the same eye colour, hair colour, or blood group as one or both parents.
- The shape of the nose, facial features, height, and other physical traits may also resemble those of the parents.
However, due to the combination and recombination of genes from both parents, the offspring is not exactly identical to either parent and shows some variations.
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संबंधित प्रश्न
Male and female gametes are ______.
Explain two main process in sexual reproduction.
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
Give a schematic representation of spermatogenesis and oogenesis in humans.
During spermatogenesis, spermatogonium grows in size to become ______.
The immature male germ cells differentiates into ______ at the end of meiosis I.
The human male gamete is usually about ______ in length.
How many sperms are formed from a secondary spermatocyte?
After ovulation, Graafian follicle regresses into ______.
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
Acrosome is a type of ______.
1st polar body is formed at which stage of oogenesis?
Which one is released from the ovary?
Follicular atresia is:
What is the difference between a primary oocyte and a secondary oocyte?
Process of maturation and development of sperms ______.
