Exam 2 Lecture 6

UIC BioS 101 Nyberg

9

Evolution, the process

• A necessary and sufficient condition for biological evolution is change of gene frequency/abundance in a population.

• Necessary means that without gene frequency change there is no evolution.

• Sufficient means that if gene frequency changes then biological evolution has occurred.

Speaker Notes:

9

Differential survival of genes. Genes/alleles which are passed on to the next generation.