deleterious
41Evolution of sexual reproduction — The evolution of sexual reproduction is currently described by several competing scientific hypotheses. All sexually reproducing organisms derive from a common ancestor which was a single celled eukaryotic species[1]. Many protists reproduce… …
42Inbreeding depression — is reduced fitness in a given population as a result of breeding of related individuals. Breeding between closely related individuals, called inbreeding, results in more recessive deleterious traits manifesting themselves. The more closely… …
43Nearly neutral theory of molecular evolution — The nearly neutral theory of molecular evolution is a modification of the neutral theory of molecular evolution that accounts for slightly advantageous or deleterious mutations at the molecular level. The nearly neutral theory was proposed by… …
44History of molecular evolution — The history of molecular evolution starts in the early 20th century with comparative biochemistry , but the field of molecular evolution came into its own in the 1960s and 1970s, following the rise of molecular biology. The advent of protein… …
45evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …
46heredity — /heuh red i tee/, n., pl. heredities. Biol. 1. the transmission of genetic characters from parents to offspring: it is dependent upon the segregation and recombination of genes during meiosis and fertilization and results in the genesis of a new… …
47Natural selection — For other uses, see Natural Selection (disambiguation). Part of a series on Evolutionary Biology …
48Negative selection (natural selection) — For other uses, see Negative selection (disambiguation). In natural selection, negative selection[1] or purifying selection is the selective removal of alleles that are deleterious. This can result in stabilizing selection through the purging of… …
49Mutation — For other uses, see Mutation (disambiguation). Part of the Biology series on Evolution …
50Senescence — refers to the biological processes of a living organism approaching an advanced age (i.e., the combination of processes of deterioration which follow the period of development of an organism). The word senescence is derived from the Latin word… …
