Which of the following is not $X$-linked recessive
Which one of the following symbols represents mating between relatives in human pedigree analysis?
A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of $sons$)
Colourblindness is caused due to
The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.