Given below is a pedigree chart showing the inheritance of a certain sex- linked trait in humans.
The trait traced in the above pedigree chart is
Dominant $X$-linked
Recessive $X$-linked
Dominant $Y$-linked
Recessive $Y$-linked
Describe pedigree analysis and draw its symbols.
If a haemophilic man marries a woman carrier (heterozygous) for haemophilia, what would be the possibility that their daughter would be haemophilic
If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father ? Comment.
Red green colour blindness appears due to
Pedigree analysis is very important in human beings because