Video Question Chapter 16

Question 1

What is natural selection? What does it act on (genotype or phenotype)?

Answer 1

When organisms with more successful phenotypes pass their alleles down to their offspring. Those with beneficial traits will contribute a larger portion of their beneficial traits to their offspring.

Question 2

What is survival of the fittest?

Answer 2

best suited to a particular environment

most common way evolution occurs

Question 3

What is genetic drift? What does it act on (phenotype of genotype)?

Answer 3

Occurs due to random chance. Creates a change in allele frequencies over time. Acts on the genotype.

Question 4

Is genetic drift more pronounced in large species or small species?

Answer 4

small

Question 5

What is gene flow? Does it act on pheotype or genotype?

Answer 5

Individuals from isolated populations swap genetic info. Another way a species can evolve via genotype. Counteracts speciation. Introduction of a new allele into a population.

Question 6

What is the Hardy-Weinberg Equilibrium?

Answer 6

Genotype (gene) and phenotype (characteristic) frequencies stay the same unless acted upon.