What must be true for a male individual to be a carrier of a Y-linked recessive allele? A.
The gene has no other alleles.

B.
The gene is only expressed in females.

C.
The gene is silenced on the Y chromosome.

D.
The gene is also found on the X chromosome.

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall