What is genetic drift? view available hint(s)what is genetic drift? the physical splitting of a habitatthe motion of continental plates over timethe production of an evolutionarily independent group of organismsa change in allele frequencies caused by random events

A change in allele frequencies caused by random events

Explanation :Genetic drift refers to a process which occur due to sampling error from preceding generations that lead to a change in allele frequency by chance alone within a population. It is a random process which  leads to large significant changes within a population over a short period of time. The rapid changes are due to increasing inbreeding coefficient s and homozygosity from the removal of alleles.

It is peculiar to a population which is synonymous with regular cycle of extinction and recolonization. Therefore, together with evolution, mutation and migration, it is one of the driving mechanism of EVOLUTION.

It is caused by;  

Static or recurring small population sizes,  

"Bottlenecks” form of population, that is drastic reduction in population size;

Repopulation from a small number of individual-FOUNDER EVENTS.

Measurements of Genetic Drift

The magnitude of genetic drift within a population depends on the effective population size for the population.This is represented as Ne.  It is a theoretical number use to quantify the number of genetically distinct individuals that contribute gametes  

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg