Biology Quiz

What does the term "genotype" refer to?

• Physical characteristics

• Physiological characteristics

• Behavioral characteristics

• Particular combination of alleles

What does the term "phenotype" refer to?

• Particular combination of alleles

• Physical, physiological, and behavioral characteristics

• Genetic makeup

• Natural selection

On what does natural selection act?

• An organism's alleles

• An organism's genotype

• An organism's characteristics

• An organism's DNA

What is the definition of allele frequency?

• The number of times an allele occurs in a gene pool, as a percentage of the total occurrence of all alleles

• The number of times a gene occurs in a chromosome

• The number of times a trait is expressed in a population

• The number of times a mutation occurs in a gene pool

If there are 50 alleles in a gene pool, and 20 of them are B (black), what is the percentage of B alleles?

• 20%

• 30%

• 40%

• 50%

If there are 50 alleles in a gene pool, and 30 of them are b (brown), what is the percentage of b alleles?

• 30%

• 40%

• 50%

• 60%

In a gene pool of 100 alleles, if 40 alleles are B (black), how many alleles are b (brown)?

• 40

• 50

• 60

• 70

In a gene pool of 100 alleles, if 60 alleles are b (brown), how many alleles are B (black)?

• 20

• 30

• 40

• 50

Which of the following is NOT one of the three evolutionary mechanisms that generate genetic variation?

• Mutation

• Genetic recombination

• Lateral gene transfer

• Natural selection

What is one of the evolutionary mechanisms that generate genetic variation?

• Genetic drift

• Genetic recombination

• Natural selection

• Gene flow