Definition of Heterosis

1. Noun. (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent.

Exact synonyms: Hybrid Vigor
Generic synonyms: Inclination, Tendency
Category relationships: Genetic Science, Genetics

Definition of Heterosis

1. n. A figure of speech by which one form of a noun, verb, or pronoun, and the like, is used for another, as in the sentence: "What is life to such as me?"

Definition of Heterosis

1. Noun. (genetics) The tendency of cross-breeding to produce an animal or plant with a greater hardiness than its parents; hybrid vigour ¹

¹ Source:

Definition of Heterosis

1. [n -EROSES]

Medical Definition of Heterosis

1. The observation that in some circumstances, the heterozygotes in a population have higher fitness than the homozygotes, for example they grow better, are better able to survive, and/or are more fertile than the homozygotes. The effect of heterosis can also apply to hybrids (thus hybrid vigor). (09 Oct 1997)

Heterosis Pictures

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Lexicographical Neighbors of Heterosis

heterosis (current term)
heterospecific antibody
heterospecific graft

Literary usage of Heterosis

Below you will find example usage of this term as found in modern and/or classical literature:

1. Botanical Gazette by University of Chicago, JSTOR (Organization) (1918)
"The diverse effects resulting from this heterozygous condition have all been included in the one term heterosis (14). Various ways in which heterosis in ..."

2. Genetics and Eugenics: A Text-book for Students of Biology and a Reference by William Ernest Castle, Gregor Mendel (1916)
"This is called heterosis, because it is supposedly due to heterozygosis, the cross-bred state of genetic factors. The mule has already been mentioned as a ..."

3. Genetics; an Introduction to the Study of Heredity by Herbert Eugene Walter (1922)
"heterosis When hybrids are formed the first hybrid generation not only shows more ... Such hybrid vigor is termed heterosis. East and Hayes describe, ..."

4. Inbreeding and Outbreeding: Their Genetic and Sociological Significance by Edward Murray East, Donald Forsha Jones (1919)
"The beneficial effect of crossing, heterosis, is a more widespread phenomenon. It may be expected when almost all somewhat nearly related forms are crossed ..."

5. Molecular Markers in Plant Genome Analysis: Sponsored CRIS/ICAR Projects and by Andrew Kalinski (1995)
"Exotic cultivars will be used to develop germplasm which shows heterosis with US japonica cultivars. Cytoplasmic and photoperiod-sensitive genetic male ..."

6. The Encyclopaedia Britannica: “a” Dictionary of Arts, Sciences, Literature edited by Hugh Chisholm (1911)
"It may be called the law of " translation of heterosis. ... But of equal importance is the independent " heterosis" of these visceral ..."

7. Genetic Studies of Rabbits and Rats by William Ernest Castle (1922)
"Nevertheless, with the disappearance of the heterosis effect in F» the average ... The heterosis effect is seen in the Fj generation produced by crossing a ..."

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