Questions in genetics

Select	Question
	A family has five girls and no son. Probability of son as the 6th child will be
	The first plant in which chromosomal basis of sex determination was discovered is
	In Drosophila, the sex is determined by
	A colour blind man marries the daughter of a colour blind person. Then in their progeny
	Given is : X is the chromosome with gene for haemophilia and X is the chromosome with normal gene. Which of the following individuals will act as carrier for haemophilia
	Colour blindness is found more in males than in females because
	Sex–linked characters are
	Which one is a sex–linked disease
	If mother is a carrier for colour blindness and father is normal, then in the offsprings this disease may be seen in
	Which one is the sex linked trait