Select ALL of the statments that correctly describe evolutionary change. 1.If a
ID: 67667 • Letter: S
Question
Select ALL of the statments that correctly describe evolutionary change.
1.If a heritable trait is benefical, all mechanisms of evolutionary change will increase its frequency within a population. 2.Evolutionary change can act on traits that are not determined by genes. 3.A population can be influenced by multiple mechanisms of evolution at the same time. 4.Heritable traits that are not benefical for individuals within a population will be eliminated by the mechanisms of evolutionary change. 5.Evolution can change the allele frequencies in a population, but cannot alter an individual's allele frequences.Explanation / Answer
Changes in the genes controlling development can have major effects on the morphology of the adult organism. Because these effects are so significant, scientists suspect that changes in developmental genes have helped bring about large-scale evolutionary transformations. Developmental changes may help explain, for example, how some hoofed mammals evolved into ocean-dwellers, how water plants invaded the land, and how small, armored invertebrates evolved wings.Evolution is change in the heritable traits of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organisation, including the levels of species, individual organisms, and molecules. the changes in allele frequencies within a single population. Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. Mutations are the ultimate source of new alleles in a gene pool.
Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift. One of the main controversial issues in population genetics is concerned with the relative importance of both mechanisms in determining evolutionary changes. Natural selection usually predominates in large populations whereas genetic drift does so in small ones.