Question about s*x-linked traits?

Question

II need to figure out the correct answer to this question and would like to know if someone can tell me what the correct answer is...

s*x-linked traits....

(1) have their loci on the s*x chromosomes.

(2) are expressed more often in males than in females.

(3)are expressed in females in the same fashion as autosomal traits.

(4) all of these.

(5)none of these.

Answer 1

I believe the answer is (4) all of these.

(1) s*x linked traits are always located on the s*x chromosomes...the X chromosome to be exact.

(2) they are usually expressed more often in males than females because males have only one X chromosome so only have to have that one X chromosome having the recessive gene where as in females on X can have the recessive gene and the other X can be dominant so therefore wouldn't show the s*x-linked trait.

(3) For the same reasoning as the female part as above applies as being inherited the same as autosomal traits.

Answer 2

I agree I believe the answer is 4

Answer 3

4 (all of these) would be correct ONLY if you are talking about X-linked recessive traits (the most commonly studied).  

X-linked dominant traits are expressed more often in females than in males.

Y-linked traits are not found in females at all, and are NOT expressed in females in the same fashion as autosomal traits.