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प्रश्न
Explain two main process in sexual reproduction.
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उत्तर
Two main processes involved in sexual reproduction:
- Gamete formation: In this, meiotic division occurs due to which chromosome number is reduced to half. As a result, haploid gametes are formed (2n → n).
- Fertilization: Haploid male gamete (n) fuses with the haploid female gamete (n) to form a diploid zygote (2n).
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संबंधित प्रश्न
Define spermiogenesis.
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
Describe the process of oogenesis in human female.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
The male sex hormone testosterone is secreted from ____________.
The Androgen Binding Protein (ABP) is produced by ____________.
Answer the following type of question Assertion (A) and Reason (R).
(A) - Head of the sperm consists of acrosome and mitochondria.
(R) - Acrosome contains spiral rows of mitochondria.
Expand the acronym.
hCG
Identify the longest period of menstrual cycle.
After ovulation, Graafian follicle regresses into ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
1st polar body is formed at which stage of oogenesis?
Which one is released from the ovary?
Which of the following is a primary sex organ of female?
Mark the odd one.
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
Select a correct pair of cells with identical set of chromosomes.
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
During oogenesis the meiotic division is arrested at ______ before fertilization.
