Page 48 - CB1.3 Genetic Varation sciPAD

BIG IDEA
Genetic variation within and
between populations influences
their adaptability, evolution and
long-term survival.
LEARNING FOCUS
• Genetic variation within a population contributes to its ability to adapt to
changing environmental conditions. 49 - 53
• Natural selection can drive changes in the genetic variation of populations over
time. 51 - 55
• External factors can lead to population bottlenecks, founder effects and
migration, which can all drive changes in genetic variation. 56 - 59