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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
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Ovulation is induced by a hormone called ______.
Describe the process of oogenesis in human female.
The Androgen Binding Protein (ABP) is produced by ____________.
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.
The secondary oocyte enter into the fallopian tube through the ______.
Which of the following are known as the nourishing cells present in the seminiferous tubules?
Which of the following occurs during maturation phase of spermatogenesis?
The human male gamete is usually about ______ in length.
In human beings, the largest cell formed during Oogenesis is ______
How many sperms are formed from a secondary spermatocyte?
Sertoli cells are found in ______.
Identify the wrong statement from the following.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
Observe the given figure and answer the questions that follow.
- Label A and B.
- Identify the process.
- What happens during this process and what is formed?
Fetal sex can be determined by examining cells from amniotic fluid looking for:
Follicular atresia is:
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
