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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
Give the name and function for ‘A’ and ‘B’ from the diagram given below
Describe the process of oogenesis in human female.
Give scientific reason.
Older women are more likely to give birth to children with some abnormalities.
Give scientific reason.
There is a menopause when women are 45-50 years old.
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 male sex hormone testosterone is secreted from ____________.
Formation of ____________ is an indication of the termination of oogenesis.
Identify the CORRECT sequence of events.
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
Which one is released from the ovary?
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
What does the figure represent?
In the process of fertilization, this is true:
During spermatogenesis meiosis occurs in ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
