Wilson detected the colour blindness disease in

Identify the given pedigree analysis.

In pedigree analysis,the symbol $ʘ$ is used for:

The most common type of haemophilia results from the congenital absence of

Both husband and wife have normal vision,though their fathers were colour blind and their mothers did not have any gene for colour blindness. The probability of their daughters becoming colour blind is (in $\%$)

Females rarely experience the physiologic defect of haemophilia because they do so only when they are: