| Terms | Definitions |
| Evolution | The individuals of the same species that occupy a give area at the same time and share a unique set of genes i called population. |
| Allele | The change in frequency of alleles in a population i called evolution. |
| Frequency of alleles | The abundance of a particular allele in relation to the sum
of all alleles at that locus in a population is called |
| Gene pool | The total genes of a trait in a population are called gene pool. |
| Modern synthesis | The combination of the principles of population genetics
and Darwinianevolutionary theory is called modern The study of the genetic events in gene pools is called population genetics. |
| Population genetics | |
| Genetic drift | The change in gene frequencies by chance is caileo
genetic drift. |
| Gene flow | Changes in gene frequency due to migration of individuals are called gene flow |
| Mutation pressure | The measure of the tendency for gene frequencies tc change through mutation is called mutation pressure. |
| Selection pressure | The tendency for natural selection to occur and upset
Hardy-Weinberg equilibrium is called selection pressure |
| Directional selection | The selection in which individuals at one phenotypic
extreme are at a disadvantage as compared to all other individuals in the population is called directional selection |
| Disruptive selection | The natural selection in which individuals of the most
commons phenotypes are at disadvantage is called |
| StabIrixIbb selection | The side:Jim wh!. :i favoiiii,:. tile intermediate against
extremes ic r.alit–––1 !ptai ilinyrslection |
| Polymorphism | The occiiirence of ‘two or more distinct forms in a
por,iiar.loii n..vithr–2Jt a range of phenotypes between them is called polymorphism. |
| Balanced
polymorphism |
Balanced polymorphism occurs when different
phenotypes are maintained • at relatively stable frequencies in the population. , |
| Heterozygote superiority | Then condition in which heterozygote is more fit than either homozygote is called heterozygote superiority. |
| Parapatric speciation | The speciation occurs in demes is called parapatric |
| Dethe | Deme is a small and local population |
| Parapatric speciation | The speciationoccurs in small local population called
demes is called parapatric speciation. |
| Sympatric veciation | Speciation that odours in populations that have
overlapping ranges is called sympatric speciation. |
| Mosaic evolution | A change in a portion of an organism while the basic form of the organism is retained is called mosaic evolution. |
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