Allele Frequency and Genetic Drift

There are 3 T alleles and 7 t alleles in a population. Calculate the frequency of the recessive allele.

• 30%

• 70%

• 10%

• 4%

Alleles that improve survival will decrease in frequency in the next generation.

• True

• False

If a population of lizards is isolated on an island, with no new immigrants over many years, any new genetic variations are most likely to come from

• recessive alleles

• natural selection

• mutations

• speciation

The allele frequencies of the mouse population in the picture are changing over time. Which is true?

• The population is evolving.

• The population is not evolving.

• The population will go extinct.

• The population's genetic variation is increasing.

What is the frequency of the dominant allele in this population?

• 30%

• 50%

• 63%

• 37%

An allele combination (BB, Bb, or bb) is called a

• phenotype

• genotype

• mutation

• gene flow

Calculate the frequency of the dominant allele in this population of beetles. Make sure to write your answer in percent form with the percent sign and no numbers after the decimal. (example: 24%)

Adaptations are features you are born with that either help you or hurt you in your environment.

• True

• False

When allele frequencies remain constant, a population is evolving.

• True

• False

What is a different version of a gene called?

• Allele

• Dominant

• Gene

• Nucleotide