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प्रश्न
Answer the following question:
How is sex determined in human beings? Explain with the help of a diagram.
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उत्तर
- In human beings, the gametes from the male parent decide the sex of the baby.
- In human beings, there are 22 pairs of autosomes and 1 pair of sex chromosomes.
- In human male gametes, two dissimilar sex chromosomes XY are present whereas in females two similar sex chromosomes XX are present.
- All children inherit 'X' chromosomes from their mother and 'X or 'Y' from their father.
- If it is X chromosome from father, then the offspring will be a daughter, and if 'Y' chromosomes, then it will be a son.
- Hence, the gametes from the male parent decide the sex of the baby.
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संबंधित प्रश्न
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
There are ................ pairs of chromosomes in the human being.
In a human, how many chromosmes are present in a fertilised egg?
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are :
(i) large chromosome
(ii) small chromosome
(iii) Y chromosome
(iv) X chromosome
Explain the haplo-diploid method of sex determination in the honey bee.
Diploid larvae which get royal jelly as food develops into ____________ and other develops into workers (sterile females).
The ‘X’ body of Henking was observed in ______.
Which of the following decides the sex of the child?
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
