Advertisements
Advertisements
प्रश्न
Explain two main process in sexual reproduction.
Advertisements
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).
APPEARS IN
संबंधित प्रश्न
Name the hormones involved in regulation of spermatogenesis.
Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.
What is gamete formation?
Give scientific reason.
There is a menopause when women are 45-50 years old.
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.
Define gametogenesis.
Describe the structure of the human ovum with a neat labelled diagram.
Expand the acronym.
hCG
Which of the following correctly describes the secondary oocyte?
Select the correct sequence of oogenesis.
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
Gray crescent is the area ______.
3-celled male gamete develops in:
Growth hormone of pituitary is more effective in ______.
Germ cells present in the seminiferous tubules undergo ______
Meiotic division of the secondary oocyte completed ______.
Distinguish between human sperm and ovum.
What is spermatogenesis?
The process of gametogenesis is initiated by ______ and ______ hormones respectively.
