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प्रश्न
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
उत्तर
Sexual reproduction involves the fusion of two types of gametes i.e., the male and the female gametes. The zygote formed contains a fusion of both the sperm nucleus and the egg nucleus. Due to this, the new individual has characteristics which are similar to both the parents while some characteristics which are different from both the parents. Thus, the new individual formed from sexual reproduction inherits the characteristics of both the parents. For example, if the father has black hair while the mother has brown hair, the chances are that their offspring may have either black or brown hair.
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संबंधित प्रश्न
Male and female gametes are __________.
Describe the process of budding in hydra.
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?
The process which the sperm undergoes before penetrating the ovum is ____________.
Which of the following correctly describes the secondary oocyte?
The immature male germ cells differentiates into ______ at the end of meiosis I.
First meiotic division is observed in ____________.
How many autosomes does a human primary spermatocyte have?
Extrusion of second polar body from egg nucleus occurs ______.
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
It The cell division in secondary oocyte is suspended at ______.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
At what stage of life is oogenesis initiated in a human female?
Layers of an ovum from outside to inside is ______.
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:
How many primary oocytes produce one oogonia?
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
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'.
