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
Lateral view of the internal male reproductive organs.
A molecular model showing chromosome territories in the cell nucleus of humans
The calcaneus spur found on the male's hind limb is used to deliver venom.
(a) Male competition can be fierce. (b) This male baboon has bite wounds suffered in competition wit
Black female Vs. Gray male