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

أنثروبولوجيا، علم الإنسان; الأنثربولوجيا الفيزيائية

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

بيولوجيا; بيولوجيا الخلايا

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

número atómico

بيولوجيا; بيولوجيا الخلايا

The number of protons in the nucleus of an atom.

asma

بيولوجيا; بيولوجيا الخلايا

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

بيولوجيا; بيولوجيا الخلايا

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

selección artificial

بيولوجيا; بيولوجيا الخلايا

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

reproducción asexual

بيولوجيا; بيولوجيا الخلايا

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