Binghamton Bio 114 exam 2; Questions & Answers…Grade A+
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Course
BIO 114
Institution
BIO 114
Binghamton Bio 114 exam 2; Questions &
Answers…Grade A+
Genetic Drift Correct answer-the constant changing of allele frequencies (that percentage
of all alleles any one, or more, allele occupies in a population) in a population over time, due to
random mating.
Random Mating Correct answer...
Binghamton Bio 114 exam 2; Questions &
Answers…Grade A+
Genetic Drift Correct answer-the constant changing of allele frequencies (that percentage
of all alleles any one, or more, allele occupies in a population) in a population over time, due to
random mating.
Random Mating Correct answer-has the effect of changing how frequently an allele is
found in a population.
GENETIC DRIFT IS RANDOM, ALWAYS DRIFTING UP AND DOWN
bottlenecks Correct answer-where a gene pool is significantly reduced for some reason
and a relatively small allele diversity remains.
Founder event/effect Correct answer-a change in allele frequencies that occurs when a
new population is established in a new area by a group of individuals. especially in small groups,
allele frequencies probably differ from the source population (common in the colonization of
isolated habitats). each time a founder event occurs, a founder effect is likely to accompany it,
changing allele frequencies via genetic drift.
non-random mating Correct answer-mating between individuals of the same phenotype
or by those who live nearby; assortative mating, inbreeding, and sexual selection.
assotative mating Correct answer-an individual is more likely to mate with another that is
similar in phenotype to itself
, Binghamton Bio 114 exam 2; Questions &
Answers…Grade A+
Inbreeding Correct answer-the mating of individuals that share a recent common
ancestor. "Recent" is relative to the organism in question and the intent to introduce novel
alleles into the offspring, or maintain allele frequency distributions the way they are.
i.e., cheetahs are so genetically similar any mating can be considered inbreeding
inbreeding depression Correct answer-the loss of fitness as homozygosity in resulting
offspring, future generations, and the population increases and heterozygosity decreases.
Evolution does not occur here since allele frequency does not change. Only the genotypes do
sexual selection Correct answer-Special case of natural selection that favors individuals
with traits that increase their ability to obtain mates.
sexual dimorphism Correct answer-the tendency of the two sexes of a species to look
different. usually caused by male/male competition (strongest male -> more mates) and female
choice (males with healthiest bodies who can afford flashy traits -> more mates)
Carolus Linnaeus Correct answer-(1707-1778) Founder of taxonomy, the branch of
biology concerned with naming and classifying organisms. Developed two part system of
naming organisms, binomial nomenclature. Named over 12,000 plants
Taxonomic Hierarchy Correct answer-a system of classifying and naming species for the
purpose of understanding and establishing relatedness between species or larger groupings
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