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gen

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. Gregor Mendel discovered genes and wrote about them--he called them "factors"--in 1865, but his work was ignored for 45 years. See DNA.

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Gen

Biology; Neuroscience

Unidad hereditaria de los cromosomas. La información genética es transportada por secuencias lineales de nucleótidos en el ADN que codifican las secuencias correspondientes de los ...

gen modificador

Anthropology; Physical anthropology

A gene that can alter the expression of another gene in the phenotype of an individual.

gen estructural

Anthropology; Cultural anthropology

Segmento de ADN que codifica para un polipéptido que no sea un regulador.

patógeno

Biology; Ecology

A microorganism that makes its host sick. Certain viruses, bacteria, and authoritarian flag-waving fanatics are common examples of pathogens. They tend to be parasites that weaken ...

proteína

Biology; Ecology

Extremely complex molecules of carbon, hydrogen, nitrogen, and other elements joined in chains of amino acids (peptides). Protein constitutes the bulk of living matter, gives it ...

eucariota

Biology; Ecology

An organism with a membraned cell nucleus. See Prokaryote.

organogénesis

Biology; Ecology

The start of organ formation in the embryo.

porosidad

Biology; Ecology

The amount of space within rocks or soils.

selva

Biology; Ecology

An evergreen forest growing in a wt, humid climate. Rainforest coverage prevents desertification and drought and hosts more than half the world's animal species. Every day ...

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