Kyle is genetically a male; this means he received a(n) ________.
a. X chromosome from his mother, and a Y chromosome from his father
b. Y chromosome from his mother, and a Y chromosome from his father
c. X chromosome from his mother, and an X chromosome from his father
d. Y chromosome from his mother, and an X chromosome from his father
Question 2
In the presence of the Y sex chromosome, male hormones called ________ are secreted. This causes the fetus to develop testicles, a penis, and male internal sexual anatomy.
a. estradiols
b. HCGs
c. androgens
d. progesterones
Male fruit fly (Drosophila Melanogaster) on a blade of grass.
External and internal male genitalia.
Organization of (a) the Alpha-globin gene subfamily on chromosome 16
G-banded karyotype of a normal human male
The potential involvement of colchicine in doubling the chromosome number
How to impress a choosy female: Male fiddler crabs (top) wave their one enlarged claw to a attract a