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प्रश्न
A colour-blind child is born to a normal couple. Work out a cross to show how it is possible. Mention the sex of this child.
उत्तर
Colour blindness is a sex-linked disease. The gene for this disorder is present on the X chromosome. Hence, it is carried by normal females not expressing the disease.
If a colour-blind child is born to a normal couple, then the mother would be the carrier of the disease. The child would be male.
The following cross shows the inheritance of the disorder:
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संबंधित प्रश्न
In which of the following disorders number of chromosomes present is 47?
(A) Turner’s syndrome
(B) Cushing’s syndrome
(C) Acquired Immuno - Deficiency Syndrome
(D) Down’s syndrome
Which of the following traits is never observed in a human female?
What is the reason for the 21st trisomy?
Identify the INCORRECT statement.
Mental retardation in man associated with sex chromosomal abnormality is usually due to ______.
The most striking example of point mutation is found in a disease called ______.
Klinefelters’ syndrome is characterised by a karyotype of ______.
Females with Turner’s syndrome have ______.
The practice of analyzing inheritance patterns in human beings is called ______
Identify chromosomal disorder caused due to non-disjunction of the 21st number of chromosomes and enlist its symptoms.
