Evolution Within Population

Question 1

Selective Pressure is the ____ for animals to evolve

Answer 1

reason

Question 2

Lamarckism is an ____ theory about ____ that says an organisms’ DNA changes based on their environment and that change will go to their offsprings

Answer 2

unproved, evolution

Question 3

Genetic Equilibrium

Answer 3

when the allele frequency in gene pools doesn’t change, meaning nothing is evolving

Question 4

Direction Selective Trend is….

Answer 4

The phenotype moving in one direction.

ex. white fur (first) in rabbits used to be popular, then brown fur became popular (middle), then black fur became popular (last)

Spectrum slides across

Question 5

Stabilizing Selective Trend is…

Answer 5

Selection against phenotypes on both ends of the spectrum. Stabilizes allele frequency for middle phenotype

ex. brown fur for rabbits (middle) are more favorable than white or black (first & last)

Question 6

Disruptive Selective Trend is

Answer 6

Selects phenotypes for either ends on spectrum and against the one in the middle

ex. white fur (first) or black fur (last) is more favorable than brown fur (middle)