another unit test i forget which one Flashcards
(29 cards)
Emigration
leaving environment to another
Predation
what drives natural selection ava says
Natural Selection
survival of fittest
Founder Effect
a phenomenon in population genetics where a new population is established by a small number of individuals from a larger, diverse parent population
Monophylitic
descended from a common evolutionary ancestor, the product essentially
Analogous
the same features, birds and bats, different species, but both HAVE WINGS
Biological Fitness
an organism’s ability to pass its genetic material to its offspring
Gene migration
the movement of genetic material from one population to another
Random Breeding
a mating system where individuals within a population have an equal chance of mating with any other individual, regardless of their genotype
Genetic Drift
is the change in the frequency of an existing gene variant in a population due to random chance, stepping on bugs.
Selection Pressure
evolutionary force that causes a particular phenotype to be more favorable in certain environmental conditions
Isolating mechanisms
pre and post zygotic
Reproductive barriers
factors that prevent two different species from successfully interbreeding and producing viable, fertile offspring
Vestigial features
structures or characteristics in an organism that were once useful to their ancestors but have become largely or completely non-functional in the current species, kinda like an appendix
Divergent Evolution
a process where two or more related populations of a species accumulate differences, eventually leading to the formation of distinct new species, elaphant mammoth
Biological Species Concept
defines a species as a group of populations that can interbreed and produce viable, fertile offspring, and that are reproductively isolated from other such groups
Mutations
Random change in DNA of an individual that
introduces a new trait, can give selective advantage
Non-Random Mating
Individuals pick who to mate with based on a
preferred phenotypes, bull fighting
Sexual Selection
Natural selection where males compete for a
partner and females chose a partner, birds.
pre-zygotic isolation
stop zygote from happening
post-zygotic isolation
cant have offspring (mule)
Allopatric Speciation
geological barrier stopping reproduction
Sympatric Speciation
genetic varient making it not possible to breed, pre&post zygotic.
slow evolution
gradualism
