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प्रश्न
“Gender of child is determined by the male partner of couple”. Draw a diagram explaining the above statement.
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उत्तर
1). The chromosome number in germ cells producing the gametes are diploid i.e. 2n. It includes 22 pairs of autosomes and 1 pair of sex-chromosomes i.e. (44 + XX or 44 + XY).
2). These germ cells divide by meiosis.
3). Due to this, gametes contain only haploid (n) number of chromosomes i.e. (22 + X or 22 + Y).
4). Two types of sperms are produces as (22 + X) or (22 + Y) whereas oocytes are produced of only one type as (22 + X).
5). Both, sperms and oocytes are produced by meiosis.
6). In case of sperms, process of meiotic division is completed before the sperms leave male reproductive tract.
7). However, in case of oocytes, process of meiotic division completes after ovulation; during fertilization in oviduct.
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संबंधित प्रश्न
Explain the process of birth in human beings.
Name any three parts of the female reproductive system in human beings. Write one function of each.
List two example of each diseases caused due to (i) bacterial infection and (ii) viral infection. Which device or devices may be used to prevent the spread of such diseases.
Name the respective part of human female reproductive system:-
(i) that produces eggs,
(ii) where fusion of eggs and sperm takes place, and
(iii) where zygote gets implanted.
Match the Column:
| no | Column A | Column B |
| 1 | Allele | Control of automobile exhaust |
| 2 | Leydig cells | Tourniquet |
| 3 | Utriculus | Alternate forms of genes |
| 4 | Snake bite | Dynamic equilibrium |
| 5 | Euro IV norms | Testosterone |
| Sudden change in genes | ||
| Static equilibrium |
Where is the female gamete formed in humans?
What are the male sex cells in humans called?
What is the name of the process in which thickened uterus lining alongwith blood vessels is removed from the body of a human female through vaginal bleeding?
What is puberty?
What changes are seen in boys at the time of puberty?
The male gametes in a flower and in a human are produced respectively in :
(a) stigma and ovary
(b) anther and style
(c) ovary and testes
(d) anther and testes
In humans, sperm production occurs in the organ ______.
In humans, ______ chromosome is responsible for maleness.
Define the following:
Gestation
Draw a labeled diagram of the human female reproductive system.
Cryptorchidism is a condition where ______.
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will NOT be transported form ______
Mention any two changes that are common to both boys and girls in early teenage years.
Humans are classified as which type of reproducing organisms based on their mode of reproduction?
