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प्रश्न
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
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उत्तर
The sex of the child depends on the father. The egg contains only one X chromosome, but half of the sperm contain an X chromosome whereas the other half contains a Y chromosome. It is simply a matter of chance as to which category of sperm fuses with the ovum and this determines whether the child will be male or female.
If the egg fuses with X-bearing sperm, the resulting combination is XX and the resulting child is female. If the egg fuses with Y-bearing sperm, the resulting combination is XY and the resulting child is male.
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संबंधित प्रश्न
A new born child has an XY pair of chromosmes. Will it be a baby boy or a baby girl?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Define the following:
Sex chromosomes
Explain the following terms:
Identical twins
Haplodiploidy is found in ______.
Which of the following statements is not true with respect to variation?
Select the statements that describe characteristics of genes
- genes are specific sequence of bases in a DNA molecule
- a gene does not code for proteins
- in individuals of a given species, a specific gene is located on a particular chromosome
- each chromosome has only one gene
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
A zygote which has Y chromosome inherited from the father will develop into a ______.
