Evolution and Population Dynamics Flashcards
Inbreeding occurs when mates have a
Large proportion of shared ancestry
The bottleneck effect describes a situation in which
A population becomes very small due to an environmental stress and loses much of its genetic diversity
Stabilizing selection describes a process in which
An intermediate trait is favored
A high fecundity means that
An organism can produce more offspring
Zygote mortality refers to the
Inability of a zygote to survive embryological development
Genetic drift refers to
The changes in the frequency of alleles in a gene pool, simply due to chance
Assortive mating is when
Mates are not chosen randomly
What happens during assortive mating?
Certain individuals are selected over others possibly because of phenotype or location
Directional selection occurs when
One extreme is favored over another
Gene flow refers to
The alterations in the composition of a gene pool due to migration of individuals between different populations
Disruptive selection occurs when
Two extremes are favored
Coevolution occurs when
Two species evolve alongside each other and exert evolutionary pressures on one another
Differential reproduction is the idea that
Certain individuals are more likely to reproduce than others
Group selection is the idea that
Traits that benefit the population as a whole will still be selected for even if they don’t directly help the individual expressing that trait to survive and reproduce
Convergent evolution occurs when
Two populations that don’t share a recent common ancestor start to resemble each other as they adapt to the same or similar environments
