Question

The recessive genes located on X-chromosome of humans are always (1)Lethal (2)Sub-lethal (3)Expressed in males (4)Expressed in females

Answer 1

Answer:

Males are always affected due to the recessive gene on the X-chromosome as they have only a single X-chromosome and there is nothing to suppress the character and hence it will be expressed. 

Whereas in females, there are two X chromosomes and can be suppressed by the other

So, the correct answer is(3.) 'Expressed in males'

Answer 2

Answer:

The recessive genes located on X-chromosome of humans are always

(1)Lethal

(2)Sub-lethal

(3)Expressed in males ✔✔✔

(4)Expressed in females