Biology (population genetics) 9A

The sum of all alleles that all individuals of a population of organisms can posses.

the range of genotype differences between individuals from the same gene pool

• gene

• variation

• genetic drift

• allele frequency

how often an allele shows up

• allele frequency

• mutation

• genetic drift

• gene pool

plasmids are

• IDK

• Large, square DNA molecules that function like chromosomes.

• Alleles that are DNA molecules and function like genes

• small, circular DNA molecules that function like chromosomes

In large populations with thousands of individuals, the allele frequency is stable.

• gene pool

• genetic drift

• Alleles

• Genetic Equilibrium

What is genetic drift?

• the changes in allele frequencies (genes) ,in a population, happening due to random events/circumstances.

• It is an example of primary succession

• Genetic drift are different organisms in a population due to inherited traits from their parents

• It is part of symbiotic relationships such as mutualism, commensalism, parasitism

Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

 Genetic Drift is more likely to happen in... 

• aquatic populations
• small populations
• terrestrial populations
• older populations

Which of the following is an example of the founder effect?

• Humans choose two dogs they like the characteristics of and breed them together.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

Which of the following is an example of the bottleneck effect?

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Humans choose two dogs they like the characteristics of and breed them together.