Which of the following is a sex-linked character
Baldness
Polio
Colourblindness
Heart disease
Phenyketonuria is a genetic disorder of
Given below is a pedigree chart of a family with five children. It shows the inheritance of attached earlobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals Which one of the following conclusions drawn is correct
A colour blind son will born when
Haemophilia, a $X$-linked recessive disease is caused due to deficiency of