A woman who has a sex-linked recessive trait has a son with a man who does not have that trait. Which of the following is true about their son? Choose 1
A
He can only be an unaffected carrier.

(Choice B)
B
There is a 100\%100%100, percent chance he will be affected.

(Choice C)
C
There is a 50\%50%50, percent chance he will be unaffected.

(Choice D)
D
There is a 0\%0%0, percent chance he will be affected.

Mention true or false : a) cholera is marked by acute diarrhea and no urination. b)mosquitoes are the source of dysentery germs.

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species