Thalidomide was a prescription drug that was used in the late 1950's to treat the pregnant mothers for the morning sickness.

Thalidomide was a prescription drug that was used in the late 1950's to treat the pregnant mothers for the morning sickness. This drug was immediately taken off the market because it resulted in severely deformed or missing limb structures in the developing embryos. Thalidomide is an example of a: (circle all that correct)

a. aneuploidy

b. teratogen

c. virus

d. gene mutation