Question about sex-linked traits?

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...





Sex-linked traits....





(1) have their loci on the sex 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.

Question about sex-linked traits?
I believe the answer is (4) all of these.





(1) sex linked traits are always located on the sex 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 sex-linked trait.


(3) For the same reasoning as the female part as above applies as being inherited the same as autosomal traits.
Reply: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.
Reply:I agree I believe the answer is 4