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प्रश्न
Long answer type question.
In the answer for inheritance of X-linked genes, Madhav had shown carrier male. His answer was marked incorrect. Madhav was wondering why his marks were cut. Explain the reason.
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उत्तर
A male has X and Y chromosomes. The X-linked genes do not have their alleles on Y chromosome. Therefore, for males to suffer from disease only one copy of a defective gene is sufficient. In the inheritance of X-linked genes, females may be carriers because they have two X chromosomes and may carry one normal and another defective gene. This is not possible in the case of males due to the presence of a single X chromosome.
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संबंधित प्रश्न
the Biological/technical term for An alteration in the genetic material that can be inherited.
Give scientific reasons : Colour blindness is more common in men than in women.
Choose the correct answer:
Haemophilia is due to recessive gene on __________
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A colourblind male cannot distinguish any colour.
If a woman has an allele for an X-Linked condition i.e. haemophilia, on one of her X chromosomes then this chromosome can be inherited by ______
What would be the progeny obtained if a haemophilic male marries a female with normal blood clotting?
If a colour blind man marries a normal visioned woman, what is the percentage of offsprings showing colour blindness phenotypically?
Name any two X-Linked recessive disorders.
Give examples of X-linked traits.
