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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.
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
Give scientific reasons : Colour blindness is more common in men than in women.
Briefly explain the term ‘Mutation’.
Differentiate between:
character and trait.
Why are sex linked recessive characters more common in the male human beings?
Which type of progeny would be produced if a normal visioned man marries a colour-blind woman?
Identify the CORRECT statement from the following.
Both male and female have normal vision though their fathers were colour blind mothers did not have any gene for colour blindness. The probability of their daughter becoming colour blind is ______.
If a carrier woman marries a normal visioned man, what is the percentage possibility of sons being colourblind?
Rakesh is colour blind, married to Sangeeta who is having normal v1s10n (Homozygous). They have a son and a daughter. Determine the type of vision in their children with the help of a suitable chart.
