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प्रश्न
Why is the frequency of red-green colour blindness is many times higher in males than that in females?
उत्तर
For becoming colourblind, the female must have the allele for it in both her X-chromosomes; but males develop colourblindness when their sole x-chromosome has the allele for it.
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संबंधित 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.
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
Write a note on Down’s syndrome.
Give reasons for the development of Turner’s syndrome and also mention its symptoms.
Identify the option that correctly represents the number of chromosomes in Down syndrome.
Mongolism is a genetic disorder which is caused by the presence of an extra chromosome number ______.
Read the following and answer from given below:
According to Mendel, one gene controls the expression of one character only. The ability of a gene to have multiple phenotypic effects because it influences a number of characters are an exception. The gene has multiple phenotypic effects because its ability to control two or more characters can be seen in cotton. In cotton, a gene for the lint also influences the height of the plant, size of the ball, number of ovules, and viability of seeds.
Which of the following disorder is an example of genes with multiple phenotypic effects?
Which of the following is called as Royal disease?
What is the genotype of Turner's Syndrome?
Describe Turner's syndrome.
