When Baby Ian is held horizontally on his back, he sometimes makes an "embracing" motion by arching his back, extending his legs, throwing his arms outward, and then bringing his arms in toward his body. Ian is demonstrating the

A genetic disorder caused by a mutation that produces a protein with toxic consequences would be classified as

a. a toxic gain of function. b. recessive. c. a toxic loss of function. d. congenital. e. degenerative.

What percent of all cases are found between an SD of +1 and an SD of -1 on a normal curve?

a. 50 b. 68 c. 95 d. 99