Origin and Evolution of Life Flashcards
Population definition
individuals of the same species
Mendelian Population definition
a small group of interbreeding populations
Gene pool definition
genetic information encoded in the sum total of genes in a Mendelian Population
Gene Frequency definition
the proportion of an allele in the gene pool, to the total number of alleles at a given locus
Names
T. Dobzhansky, J.B.S. Haldane, R. Fisher, Sewall Wright, G.L. Stebbins, E. Mayr, Simpson, Stebbins, Medel, T. H. Morgan, and J. Huxley
Factors affecting
Gene Variation
Gene frequency
Isolation
Natural Selection
Darwin Main driving force Fittest-offspring-survival adapted-grow and produce evolutionary change - differential - change in gene frequency example - moths
Isolation types
Geographical
Reproductive
Geographical isolation (4 points)
physical isolation
geographical barrier
new traits
do not interbreed
Pre-mating isolation type
Habitat isolation (same geographic region, different habitat) Seasonal isolation (sexual maturation at different season) Ethological isolation (mating behavior) Mechanical isolation
Post mating isolation
Gamete mortality
Zygote mortality
hybrid mortality
Gene variation definition
change in gene and gene frequency
Gene mutation definition
a sudden permanent heritable change
change in a gene, chromosome, chromosome number
single gene- gene mutation
Genetic recombination definition
an exchange between non-sister chromatids - crossing over
Gene flow definition
movement of the gene in or out of the population
