A male rat is castrated immediately after birth and then given injections of estradiol and progesterone in adulthood. This male rat would be expected to
A) exhibit enhanced inter-male aggression.
B) attempt to copulate with a female in heat.
C) show lordosis in response to another male.
D) attempt to copulate with a nonestrous female.
E) show maternal aggression.
Question 2
Which of the following conditions will block or diminish female rodent sexual behavior?
A) damage to the lateral thalamus
B) being in a nonestrous state
C) targeted mutations of ghrelin receptors
D) genetic ablation of the SRy gene.
E) administration of estradiol followed by progesterone.
Male giraffes will engage in necking to establish dominance.
Closeup of a male snow leopard
Endocrine System - male
Compared to a chimpanzee, the human newborn has relatively little room to spare as it passes through
Comparison of (a) male and female skulls and (b) male and female pelves.
Angle of insertion for three types of injections.