What is the ultimate source of genetic variability?

There are three primary sources of genetic variation: 1. Mutations are changes in the DNA. A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. 2. Gene flow is any movement of genes from one population to another and is an important source of genetic variation. read more

Variation must exist among individuals, variation must result in differences in numbers of viable offspring produced, and variation must be genetically inherited. read more

The ultimate source of all new genetic variation is: a) mutation. b) genetic drift. c) speciation. d) mitosis. e) all of the above. 3. Evolutionary change can occur: a) through random genetic drift. b) when a population is not in Hardy-Weinberg equilibrium. c) when mutation occurs. d) a and c. 4. read more