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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
Briefly explain the term ‘Mutation’.
Expand the following biological abbreviations : DNA
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A family consists of two parents and their five children and the pedigree chart shown below shows the inheritance of the trait colour blindness in them.
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Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Male act as a carrier for colourblindness.
Short Answer Question.
Observe the given pedigree chart and answer the following question.
Identify whether the trait is sex-linked or autosomal.
The criss-cross pattern of inheritance is observed in ____________.
In which of the following case colour blind daughter will be born?
Identify the INCORRECT statement with regard to haemophilia.
