Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?
Females have $XX$ chromosomes, to become colourblind both the chromosomes should have alleles for colourblindness.
However males have only one$X$ chromosome so they have more chances of colourblindness.
Recessive characters are expressed
Which one of the following symbols and its representation, used in human pedigree analysis is correct ?
The character of organisms is said to be sex linked when its gene is carried on
In a sickle cell anaemia glutamic acid is replaced by valine, which the following codes for glutamic acid ?
Pattern baldness, moustaches and beard in human males are examples of