Lucas has one allele for normal blood cells and one allele for sickle-shaped cells. Lucas' blood cell alleles are

The brain is fully formed, and the fetus can feel pain at

a. 4 weeks after conception. b. 8 weeks after conception. c. 12 weeks after conception. d. 16 weeks after conception. e. 4 weeks prior to birth.

When Mason cries, his mother responds by picking him up. When he coos, his mother talks to him. She smiles when he smiles. These are examples of which of the following?

A) Reinforcement schedules B) Classical conditioning C) Maternal behavior shaping D) Contingent responsiveness