Loading ...
the mindset of an organization(passive) substantially influenced byVariaction – Selection and Re - stabilization
three distinct types of " selective mechanisms"and uses uses the colouration of lizards against a changing background to distinguish among the three fundamentally different types of selective pressureresultingin Stabilizing , Directional , and Disruptive effects upon phenotypes
cost - free assortment aloneleadsto speciation and disruptive selection
frequency - dependent intraspecific competition(passive) caused byassortative mating and disruptive selection
Further exposure of these isolates to anti - TB drugsmay causeselection and stabilization of spontaneous mutations
These types of selectioncan resultin directional , stabilizing , and disruptive outcomes
when phenotypes that are rare are disfavoredleadingto stabilizing selection and monomorphism
It is the selection against the heterozygotecausingdisruptive selection and divergent genotypes
mating generates stabilizing selection on male body size and genitalia , andcausesa blend of directional and stabilizing selection
to produce offspring than those with other phenotypes Heterozygote superiority / Overdominance a hypothesis in which heterozygotes have higher fitness than either homozygote Underdominance the selection against the mean of a population distributioncausingdisruptive selection and divergent genotypes
D. Stasis(passive) is likely caused byD. Stasis
eventuallywill ... resulteventually
to canalizationcan leadto canalization
after some timewill ... leadafter some time
the distinction between species(passive) originated bythe distinction between species
gene trees to differ from species trees •Directional – Rapid divergence at a locus – Estimation of sp divergence wrong •Balancing – Same lineages maintained in long - isolated speciescan causegene trees to differ from species trees •Directional – Rapid divergence at a locus – Estimation of sp divergence wrong •Balancing – Same lineages maintained in long - isolated species
to the differential suppression of pleiotropic effects ( Wagner 1996leadsto the differential suppression of pleiotropic effects ( Wagner 1996
differences in the infraspecific and interspecific rates of change [ e.g. [ 25can causedifferences in the infraspecific and interspecific rates of change [ e.g. [ 25
from each of the following scenarioswould resultfrom each of the following scenarios
negative gametic disequilibrium because individuals with similar phenotypic values tend to have a correlated set of alleles at each of the loci that contribute to the traitto causenegative gametic disequilibrium because individuals with similar phenotypic values tend to have a correlated set of alleles at each of the loci that contribute to the trait