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प्रश्न
उत्तर
Cause of Haemophilia - Haemophilia is an X-linked inherited disease. Homozygosity for recessive haemophilia gene is must to be seen in a female while a single affected X chromosome makes the male a haemophilia victim.
Cause of Colour Blindness - Colour blindness is the effect of a recessive gene. In case of female, both the X chromosomes must have the recessive gene but as males have only one X chromosome, just a single affected chromosome causes colour blindness.
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संबंधित प्रश्न
Explain why generally only the male child suffers from colour blindness and not the female?
Choose the correct answer:
A carrier haemophilic woman marries a haemophilic man. What are the chances for her progeny to be haemophilic?
Short Answer Question.
Observe the given pedigree chart and answer the following question.
Give an example of a trait in human beings which shows such a pattern of inheritance.
Long answer type question.
Explain cris-cross inheritance with suitable example.
Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is ____________.
A marriage between a colourblind man and a normal woman produces ____________.
What would be the progeny obtained if a haemophilic male marries a female with normal blood clotting?
The genes present on non-homologous part of Y-chromosome are called ____________.
Identify the progeny produced if a colour blind male marries a normal vision female.
Give examples of X-linked traits.
