BIO 320 EXAM 2 QUESTIONS AND
ANSWERS 100% CORRECT.
genetic mutation - ANSWERA molecular change to present gene to creating a new
gene
adaptation - ANSWERIn evolution, any variation that increases an organisms ability to
survive and reproduce
natural selection - ANSWERoperated on variation in a population, favoring some traits
and disfavoring others.
Disruptive selection - ANSWERcreates bimodal distributions by favoring two or more
extreme phenotypes over the average phenotype in the population
If all the conditions of the Hardy-Weinberg Principle were met in a population, how
would allele frequencies change from one generation to the next generation? -
ANSWERThey would not change
You notice that individuals of House Finch look very different on South Mountain (SW of
Tempe) compared to individuals seen on Superstition Mountain (NE of Tempe). The
finches on South Mountain have more red on their chest feathers than the birds on
Superstition Mountain. What is the reason for these differences in traits between these
2 populations? genetic/environmental - ANSWERyou can't tell
What kind of experiment could you do to confirm your answer to the previous question?
- ANSWERcommon garden
If you determine that these populations are ecotypes it means that they cannot
interbreed - ANSWERfalse; ecotypes can interbreed
Darwin's voyage on the HMS Beagle lasted: - ANSWERfive years
Genetic drift - ANSWERchange in population gene frequencies due to random events,
usually associated with relatively small populations.
Gene flow - ANSWERoccurs when alleles are transferred from one population to
another via movement of individuals or gametes (e.g. pollen, seeds, juveniles, eggs)
Stabilizing selection - ANSWERacts to conserve genetic make-up of a population by
acting against extreme phenotypes and favoring average phenotype; variance is
reduced
ANSWERS 100% CORRECT.
genetic mutation - ANSWERA molecular change to present gene to creating a new
gene
adaptation - ANSWERIn evolution, any variation that increases an organisms ability to
survive and reproduce
natural selection - ANSWERoperated on variation in a population, favoring some traits
and disfavoring others.
Disruptive selection - ANSWERcreates bimodal distributions by favoring two or more
extreme phenotypes over the average phenotype in the population
If all the conditions of the Hardy-Weinberg Principle were met in a population, how
would allele frequencies change from one generation to the next generation? -
ANSWERThey would not change
You notice that individuals of House Finch look very different on South Mountain (SW of
Tempe) compared to individuals seen on Superstition Mountain (NE of Tempe). The
finches on South Mountain have more red on their chest feathers than the birds on
Superstition Mountain. What is the reason for these differences in traits between these
2 populations? genetic/environmental - ANSWERyou can't tell
What kind of experiment could you do to confirm your answer to the previous question?
- ANSWERcommon garden
If you determine that these populations are ecotypes it means that they cannot
interbreed - ANSWERfalse; ecotypes can interbreed
Darwin's voyage on the HMS Beagle lasted: - ANSWERfive years
Genetic drift - ANSWERchange in population gene frequencies due to random events,
usually associated with relatively small populations.
Gene flow - ANSWERoccurs when alleles are transferred from one population to
another via movement of individuals or gametes (e.g. pollen, seeds, juveniles, eggs)
Stabilizing selection - ANSWERacts to conserve genetic make-up of a population by
acting against extreme phenotypes and favoring average phenotype; variance is
reduced
