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Hace 5 días · Much was lost over time because of natural selection, chance, or lineages simply dying out. Analyzing ancient samples from modern humans, and tracing how they gained and lost Neanderthal genes over time, would tell a more complete evolutionary story about the origin of the Neanderthal genes that persist today.
Hace 4 días · Natural selection, process in which an organism adapts to its environment through selectively reproducing changes in its genotype. It reduces the disorganizing effects of migration, mutation, and genetic drift by multiplying the incidence of helpful mutations, since harmful mutation carriers leave few or no offspring..
Hace 5 días · Population genetics is the study of the genetic composition of populations, including distributions and changes in genotype and phenotype frequency in response to the processes of natural ...
Hace 5 días · Natural selection is differential reproduction. Demographic and ethnographic, historical and genetic evidence suggest that, over the course of our evolutionary past, members of H. sapiens varied in reproductive success. Selection for emotions and other adaptations underlying intrasexual and intersexual competition should have been ...
Hace 3 días · This variation arises through genetic mutation and is important as it provides the diversity within and between populations required for natural selection.
Hace 4 días · Culturally-driven evolution can defy the expectations of natural selection: while human populations experience some pressure that drives a selection for producing children at younger ages, the advent of effective contraception, higher education, and changing social norms have driven the observed selection in the opposite direction.
Hace 4 días · Género: Comedia Dramática. Estreno: 2015. Sinopsis: “Directo al Corazón” sigue la historia de Danny Collins (Al Pacino), un rockero envejecido que, a pesar de su éxito y fama, ha perdido el rumbo de su vida debido a su hedonismo y excesos.
