gen modificador

A chunk of DNA that allows organisms to pass on adaptations and acquired features by making a protein through codon sequences. DNA duplication errors often create new genes. ...

gen

Biologia; Genom

The fundamental physical and functional unit of heredity. A gene is an ordered sequence of nucleotides located in a particular position on a particular chromosome that encodes a ...

enfermedad endémica

Antropologia; Antropologia fizyczna

A disease that remains at a more or less constant frequency of affected individuals in a population all of the time. Examples: hypertension, tooth decay, and malaria.

polimorfismo

Antropologia; Antropologia fizyczna

A genetic trait controlled by more than one allele, each of which has a frequency of 1% or greater in the population gene pool. See balanced polymorphism.

termoluminiscencia (TL)

Antropologia; Antropologia fizyczna

A radiometric dating method based on the fact that trace amounts of radioactive atoms, such as uranium and thorium, in some kinds of rock, soil, and clay produce constant low ...

modelo de asimilación

Antropologia; Antropologia fizyczna

A hypothesis to explain the origin of modern Homo sapiens. It proposes that the first modern humans evolved in Africa, but when they migrated into other regions they did not ...

potasio-argón

Antropologia; Antropologia fizyczna

A radiometric dating method based on the fact that potassium-40 in volcanic rock decays into argon-40 and calcium-40 at a known rate. The half-life of potassium-40 is ...

pedernal

Antropologia; Antropologia fizyczna

A kind of hard, rock with a glassy opaque appearance. It was a favorite raw material for many prehistoric humans for the manufacture of tools such as knives and scraping ...