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प्रश्न
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
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उत्तर
- A female has millions of oocytes at the time of birth and new ova are not formed thereafter.
- Menopause occurs at approximately 40-50 years of age and hence fewer numbers of eggs are present with reduced fertility since the oocytes have aged.
- Their ability to divide diminishes and they may not be able to complete meiotic division properly.
- Fertilization of such oocytes may result in the production of genetic abnormalities (like Down’s syndrome) in offsprings.
Hence, if newborns are produced at the age of menopause, they may be with some abnormalities.
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संबंधित प्रश्न
With the help of diagrammatic representation, explain the process of gametogenesis
What is oogenesis?
Describe the process of oogenesis in human female.
Draw a labeled sketch of a spermatozoan.
Give a schematic representation of spermatogenesis and oogenesis in humans.
Identify the given image and label its parts marked as a, b, c and d
Which of the following enter the maturation phase of oogenesis?
Identify the enzyme released by the sperm which has lytic activity.
Which of the following events take place during spermatogenesis?
Middle piece of mammalian sperm possesses ______.
Connective tissue around seminiferous tubules possess endocrine cells called ______.
Which among the following has 23 chromosomes?
Spermiation is the process of the release of sperm from ______.
Cells of corona radiata remain grouped together by ______.
The nutritive cells found in seminiferous tubules are ______.
Acrosome is a type of ______.
Which of the following are called dual gland?
Aquatic animals in which fertilisation occurs in water are said to be
Capacitation refers to changes in the ______.
Draw a labelled diagram of a section through the ovary.
