In humans,polydactyly is caused by the effect of a/an ...

If a colour blind female marries a man whose mother was also colour blind,what are the chances of her progeny having colour blindness (in $\%$)?

Consider the following human disorders: $i$. Hemophilia,$ii$. Down's syndrome,$iii$. Cystic fibrosis,$iv$. Color blindness,$v$. Night blindness. Which of these represent Mendelian disorders?

If a haemophilic man marries a woman carrier (heterozygous) for haemophilia,what would be the possibility that their daughter would be haemophilic (in $\%$)?

The disease 'Haemophilia' is caused due to the lack of:

Alkaptonuria is a condition in which