Mechanisms of evolution

A(n)________ is a measure of how common a certain allele is in a population.

• Allele Frequency

• Gene Pool

• Genotypical Number

• Genetic Drift

Tags

NGSS.HS-LS4-3

Which of the following best describes gene pool?

• The alleles only in the immediate family members

• A total set of different alleles in a population

• A frequency of given alleles in a population

• Half the number of the alleles within the population

Tags

NGSS.MS-LS4-4

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.

Tags

NGSS.MS-LS4-4

NGSS.MS-LS2-4

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

• random chance

• natural selection

• non-random mating (sexual selection)

• artificial selection

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

• Bald Eagles are hunted until near extinction, population recovers.
• Small group of iguanas floats to an island, starts a new population.
• Red fox pups are more likely to survive in a snowy environment if they are born white.
• Farmer chooses seeds from largest apples to plant next year.  This results in larger apples from year to year.

Tags

NGSS.MS-LS4-4

is when genes (peoples) come into or leave a population

• Genetic Drift

• Founder Effect

• Gene Flow

• Bottleneck

During gestation (pregnancy), a developing male pig had a change in his genetic code. The result was that he was able to walk and do karate.

• natural selection
• gene flow 
• migration
• mutation

Tags

NGSS.MS-LS3-1

Bats are common in Texas, especially in rocky regions. Bats with longer hang claws have demonstrated higher fitness because of their ability to cling to rock while resting.

• Adaptation
• Non-random mating
• Gene Flow
• Mutation

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-4

A physical trait favored by an environmental change can be called an

• adaptation

• extinction

• possibility

• mutation

Tags

NGSS.MS-LS4-4

All of these finches have different shaped beaks, they are an adaptation to gain access of

• Water

• Food

• Shelter

• Mates

Tags

NGSS.MS-LS4-4