Flashcards in Gene pools etc Deck (11):
: group of organisms belonging to the same species living in a specified geographical location.
define: gene pool
sum of all the genes and all of their alleles within a specific population/entire species.
define: allele frequency
proportion of one allele of a gene compared to all other alleles of the same gene.
frequency of dominant allele = no. dominant alleles/total number of alleles
frequency of recessive allele = no. recessive alleles/total number of alleles
allele frequencies are between [ , ] and must add to __
alleles are FIXED when
the frequency of a particular allele is 1
describe fixed alleles
(homozygous, all show the same phenotype for the trait). Because an alternative allele is lost, the gene pool has less variation.
define: hardy-weinberg principle
• Allele frequencies in populations tend to remain constant, generation after generation, if:
o The population is large
o The population is closed (no immigration/emigration)
o All matings are equally fertile, producing equal numbers of offspring
o Members of the population must mate at random
describe hardy-weinberg equilibrium
allele frequencies tend to stay constant over generations, and add to noe.