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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.
APPEARS IN
संबंधित प्रश्न
If X chromosome is inherited from mother and Y from father, the offspring will be male.
Explain the mechanism of sex determination in birds.
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
In a human, how many chromosmes are present in a brain cell?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
With the help of a chart, explain the method of sex determination in honeybees.
Give Technical Term:
The cell which determines the sex of a baby.
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
Name the two types of gametes produced by men.
