Question | Answer |
change in genetic makeup of a population over time | evolution |
_____ have same origin and similar structure | homologous structure |
_______similar function and structure with different origin underwent convergence | analogous structures |
closer related animals are the similar their _______ | genetic info |
use or disuse or inheritance of acquired characteristics | Lamarckian evolution (discredited) |
how was Lamarckian theory discredited | only changes in dna of sex cell can be inherited |
wats darwins theory | pressures in the environmet select for the most fit to survive and reproduce |
____ sum total of all alleles in a population | gene pool |
gene frequency | allele/ tot allele
relative freq of allele in a pop |
p | freq of dominant allele |
q | freq of recessive allele |
conditions for hardy weinberg | large pop, no mutation, random mating, no migration |
what is hw equilibrium | determines gene freq for non evolving pops |
p^2 | freq of dominant homozygotes |
q^2 | freq of recessive homozygote |
2pq | freq of heterozygote |
assortive mating | non random mating; mate selected based on certain crierias; dont change allele freq |
_______ increases favorable genes in gene pool; deviation from HW | natural selection |
_____ change allele frequ in a pop; dev from HW | mutation |
____ change in gene pool due to random chnace; dev from Hw | gene drift |
_______ loss or gain o genes b/t pops' dev from HW | geneflow/ migration |
_____ small local population | deme |
imprints in fossils | organism footprint |
petrification | minerals replacing org cells |
molds | in hollow space as animal decay |
cast | minerals deposited in molds |
directional selection | shift to one extreme |
disruption selection | shift towards variants of either extrmes and form 2 sub pops |
sexual selection is _______ nat selection | opposite |
stabilizing selection | favors the intermediate and disfavoring the extremes |