trisomía

A genetically inherited form of mental retardation usually resulting from the inheritance of an extra autosome 21. Down syndrome individuals also typically are short and stocky in ...

trisomía 18

Антропология; Физическая антропология

A rare chromosomal abnormality in which there is a trisomy of chromosome 18. This inherited condition is also called Edward's syndrome. It is characterized by severe mental ...

núcleo del átomo

Биология; Клеточная биология

An atom's core; contains protons and one or more neutrons (except hydrogen, which has no neutrons).

número atómico

Биология; Клеточная биология

The number of protons in the nucleus of an atom.

asma

Биология; Клеточная биология

A respiratory disorder caused by allergies that constrict the bronchioles by inducing spasms in the muscles surrounding the lungs, by causing the bronchioles to swell, or by ...

ascomicetos

Биология; Клеточная биология

Division of fungi that contains the yeasts and morels; ascomycetes produce an ascus (or sac) in which ascospores are produced.

selección artificial

Биология; Клеточная биология

The process in which breeders choose the variants to be used to produce succeeding generations.

reproducción asexual

Биология; Клеточная биология

A method of reproduction in which genetically identical offspring are produced from a single parent; occurs by many mechanisms, including fission, budding, and fragmentation.