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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
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Male and female gametes are ______.
Name the hormones involved in regulation of spermatogenesis.
Implantation of embryo occurs in ______.
Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.
Describe the process of oogenesis in human female.
Describe the process of spermatogenesis with the help of diagram.
Mention the differences between spermiogenesis and spermatogenesis.
Expand the acronym.
LH
The human male gamete is usually about ______ in length.
How many autosomes does a human primary spermatocyte have?
It The cell division in secondary oocyte is suspended at ______.
Spermiation is the process of the release of sperm from ______.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
Which of the following is a primary sex organ of female?
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
Which type of cell division forms spermatids from the secondary spermatocytes?
Sketch and label the process of oogenesis.
The diagram given below shows the various steps in spermatogenesis.
- Name the parts labelled '1', '2' and '3'.
- Name the process by which part '3' changes to part '4'.
