Biology 1108 unit 1 exam Questions with
Correct Answers 2026-2027
Genetic variation - CORRECT ANSWER -differences in DNA sequences, caused by mutations
Locus, loci - CORRECT ANSWER -
specific, fixed position on a chromosome where a particular gene is located
Allele - CORRECT ANSWER -An alternative form of a gene
Genotype - CORRECT ANSWER -genetic makeup of an organism
Phenotype - CORRECT ANSWER -observable characteristics of an organism
Allele frequency - CORRECT ANSWER -# of copies of allele/ total # of alleles in population
P+q=1
Evolution - CORRECT ANSWER -
a change in the frequency of alleles or genotypes in a population over time
What is that change? - CORRECT ANSWER -
observable physical traits, relative size of genes (gel electrophoresis), and specific genetic co
de (DNA sequences)
Hardy-Weinberg equilibrium - CORRECT ANSWER -(no evolution)
No differential survival or reproductive success of individuals
No migration
, No mutation
No small population
No mate choice
Genotype frequency - CORRECT ANSWER -p^2 + 2pq + q^2 = 1
Natural selection - CORRECT ANSWER -
change in an allele's frequency over time based on its impact on survival and reproduction
Fitness - CORRECT ANSWER -
measure of the extent to which the individual'e genotype is represented in the next genera
tion
Intersexual selection - CORRECT ANSWER -
females choose between male mates ~colors, attractions
Intrasexual selection - CORRECT ANSWER -within-sex competition for the female
Disruptive selection - CORRECT ANSWER -selects against the mean
Stabilizing selection - CORRECT ANSWER -selects against the extremes
Directional selection - CORRECT ANSWER -selects against one of the two extremes
Artificial selection - CORRECT ANSWER -
selection by a breeder rather than by natural selection
Correct Answers 2026-2027
Genetic variation - CORRECT ANSWER -differences in DNA sequences, caused by mutations
Locus, loci - CORRECT ANSWER -
specific, fixed position on a chromosome where a particular gene is located
Allele - CORRECT ANSWER -An alternative form of a gene
Genotype - CORRECT ANSWER -genetic makeup of an organism
Phenotype - CORRECT ANSWER -observable characteristics of an organism
Allele frequency - CORRECT ANSWER -# of copies of allele/ total # of alleles in population
P+q=1
Evolution - CORRECT ANSWER -
a change in the frequency of alleles or genotypes in a population over time
What is that change? - CORRECT ANSWER -
observable physical traits, relative size of genes (gel electrophoresis), and specific genetic co
de (DNA sequences)
Hardy-Weinberg equilibrium - CORRECT ANSWER -(no evolution)
No differential survival or reproductive success of individuals
No migration
, No mutation
No small population
No mate choice
Genotype frequency - CORRECT ANSWER -p^2 + 2pq + q^2 = 1
Natural selection - CORRECT ANSWER -
change in an allele's frequency over time based on its impact on survival and reproduction
Fitness - CORRECT ANSWER -
measure of the extent to which the individual'e genotype is represented in the next genera
tion
Intersexual selection - CORRECT ANSWER -
females choose between male mates ~colors, attractions
Intrasexual selection - CORRECT ANSWER -within-sex competition for the female
Disruptive selection - CORRECT ANSWER -selects against the mean
Stabilizing selection - CORRECT ANSWER -selects against the extremes
Directional selection - CORRECT ANSWER -selects against one of the two extremes
Artificial selection - CORRECT ANSWER -
selection by a breeder rather than by natural selection
