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How many eggs are released by a human ov...

How many eggs are released by a human ovary in a month ? How many eggs to do think would have been released , if the mother gave birth to identical twins ? Would you answer change if the twins born were fraternal ?

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**Step-by-Step Solution:** 1. **Determine the number of eggs released by a human ovary in a month:** - The human ovary typically releases one egg (ovum) during each menstrual cycle, which occurs approximately once a month. 2. **Identify the scenario for identical twins:** - Identical twins arise from the fertilization of a single egg by a single sperm. After fertilization, the zygote divides into two embryos. Therefore, in the case of identical twins, only one egg is released and fertilized. ...
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Given below is a diagram of the reproductive system of a human female : (i) Name the parts numbered 1-6. (ii) Normally after how many days does an ovary release an egg? (iii) Where are the sperms released during coitus? (iv) What do the sperms do after being released ? (V) What is the function of the organ numbered 5 ? (vi) How many days does it normally take from the fertilisation of the egg up to the birth of the baby?

A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds. Answer the following question giving reasons: (a) What would have been the minimum number of ovules present per-pollinated pistil ? (b) How many microspore mother cells would minimally be required to produce requisite number of pollen grains ? (c) How many pollen grains must have minimally pollinated the carpel ? (d) How many male gametes would have used to produce these 200 viable seeds ? How many megaspore mother cells were required in this process?

A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. Answser the following questions giving reasons : (a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil ? (b) What would have been the minimum number of ovules present in the ovary ? (c) How many megaspore mother cells were involved ? (d) What is the minimum number of microspore mother cells involved in the above case ? (e) How many male gametes were involved in this case ?

NCERT ENGLISH-HUMAN REPRODUCTION-Human Reproduction
  1. Define spermiogenesis and spermiation.

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  2. Draw a labeled diagram of sperm.

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  3. What are the major components of seminal plasma?

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  4. What are the major functions of male accessory ducts and glands?

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  5. What is oogenesis? Give a brief account of oogenesis.

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  6. Draw a labeled diagram of a section through ovary.

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  7. Draw a labeled diagram of a Graafian Follicle?

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  8. Name the functions of the following. (a) Corpus luteum (b) End...

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  9. Androgens are produced by Sertoli cells. (True/False)

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  10. Spermatozoa get nutrition from Sertoli cells. (True/False)

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  11. Leydig cells are found in ovary. (True/False)

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  12. Leydig cells synthesise androgens. (True/False)

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  13. Oogenesis takes place in corpus luteum. (True/False)

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  14. Menstrual cycle ceases during pregnancy. (True/False)

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  15. The presence or absence of hymen is not a reliable indicator of virgin...

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  16. What is menstrual cycle ? Name the hormones that regulate menstrual cy...

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  17. what is parturition ? Which hormones are involved in induction of part...

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  18. In our society a woman is often blamed for not bearing male child. Do ...

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  19. How many eggs are released by a human ovary in a month ? How many eggs...

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  20. How many eggs do you think were released by the ovary of a female dog ...

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