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
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
The process of release of the ovum from a mature follicle is called ______.
Briefly describe the process of spermatogenesis.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
During spermatogenesis, spermatogonium grows in size to become ______.
Identify the labels (i-iv) in the given diagram of the ovum.
Formation of ____________ is an indication of the termination of oogenesis.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
The immature male germ cells differentiates into ______ at the end of meiosis I.
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
Which of the following contains a fluid filled cavity called antrum?
Which among the following has 23 chromosomes?
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
3-celled male gamete develops in:
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
During oogenesis the meiotic division is arrested at ______ before fertilization.
