genetic diversity

genetic diversity

• some genes exist in only 1 form=no variation

• some genes have 2 different alleles

• some genes have multiple alleles=more variation

calculating genetic diversity

proportion of genes that have less than one allele/ numer of genes in total

new condition

• could kill the entire population if there is no genetic diversit

• population as a whole is less resisliant to change

• less likely to have alleles to cope with the change

• less robust

inbreeding

• recessive alleles are most likely to be expressed when parens are related

• genetic mutations are recessive

• more likely for offspring to express geneti mutations

genetic resource

• for selective breeding=human breeding desired charteristics

• and genetic mutation=injecting Dna from 1 species to another

decreases population size

• decreases gene pool

• due to climate change, poaching etc

• genetic bottleneck=population is so small, very little gene pool

• not robust

genetic errosion

• selective breeding=>inbreeding

• very little diversity

• few breeds being farmed

• cloning=cavandish banana

conservation

• exsitu=breeding somewhere else and reintroduction

• insitu=in place where species live like national parks or fishing quotas

• breeding programs:dna sequencing, restricitons, international coop

• done to increases genetic diversity before introduction