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Question
Answer the following question:
How is sex determined in human beings? Explain with the help of a diagram.
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Solution
- 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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RELATED QUESTIONS
Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.
The number of pair(s) of sex chromosomes in the zygote of humans is ______.
Which combination of genes in the zygote will produce children with blue eyes?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
Differentiate Intersexes from Supersexes.
How is sex determined in human beings?
The number of pairs of sex chromosomes in the zygote of a human being is ______
Which of the following decides the sex of the child?
Which of the following statements is not true with respect to variation?
Fill the blank circles in figure and identify the sex of child A and B.
