Mr. Martin is worried that, if he has a child, the child might be "unlucky" and get the "bad half" of his chromosome pairs. Mr. Martin's worry would technically be referred to as an issue involving:

Helmholtz's work included the first systematic experimental demonstration of the sensory threshold

a. True b. False

_____ refers to a person's preference for emotional and sexual relationships with individuals of the same gender, the other gender, or either gender

a. Sexual orientation b. Gender identity c. Heterosexism d. Romance