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प्रश्न
The belief that the mother is completely responsible for the sex of the child is wrong because the child
विकल्प
gets sex chromosome only from the mother
develops in the body of the mother
gets one sex chromosome from the mother and the other from the father
gets sex chromosome only from the father
उत्तर
gets one sex chromosome from the mother and the other from the father
Explanation -
The child gets one sex chromosome from the mother and one from the father. The mother has XX combination and always contributes an X-chromosome.
It is the sperm of father which determines the sex of the child. This is because half of the sperms have X-chromosomes and other half have Y-chromosomes.
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संबंधित प्रश्न
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
Name any two genetic in humans.
Define the following:
Autosomes
Kavitha gave birth to a female baby. Her family members say that she can give birth to only female babies because of her family history. Is the statement given by her family members true? Justify your answer.
Haplodiploidy is found in ______.
Human offspring’s sex is determined ______
The sex chromosome in a human ovum is ______.
