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Home > Category Index for Science Quotations > Category Index G > Category: Gamete

Gamete Quotes (2 quotes)

The assumption we have made … is that marriages and the union of gametes occur at random. The validity of this assumption may now be examined. “Random mating” obviously does not mean promiscuity; it simply means, as already explained above, that in the choice of mates for marriage there is neither preference for nor aversion to the union of persons similar or dissimilar with respect to a given trait or gene. Not all gentlemen prefer blondes or brunettes. Since so few people know what their blood type is, it is even safer to say that the chances of mates being similar or dissimilar in blood type are determined simply by the incidence of these blood types in a given Mendelian population.
[Co-author with Theodosius Dobzhansky]
In Radiation, Genes and Man (1960), 107.
Science quotes on:  |  Assumption (49)  |  Aversion (7)  |  Blood (95)  |  Chance (122)  |  Choice (64)  |  Determined (8)  |  Dissimilar (5)  |  Examined (3)  |  Explanation (161)  |  Gene (68)  |  Gentleman (17)  |  Incidence (2)  |  Marriage (31)  |  Mate (6)  |  Meaning (87)  |  Person (114)  |  Population (71)  |  Preference (18)  |  Promiscuity (3)  |  Random (21)  |  Respect (57)  |  Safety (39)  |  Similar (22)  |  Simplicity (126)  |  Trait (19)  |  Union (16)  |  Validity (22)

The genotypic constitution of a gamete or a zygote may be parallelized with a complicated chemico-physical structure. This reacts exclusively in consequence of its realized state, but not in consequence of the history of its creation. So it may be with the genotypical constitution of gametes and zygotes: its history is without influence upon its reactions, which are determined exclusively by its actual nature. The genotype-conception is thus an 'ahistoric' view of the reactions of living beings—of course only as far as true heredity is concerned. This view is an analog to the chemical view, as already pointed out; chemical compounds have no compromising ante-act, H2O is always H2O, and reacts always in the same manner, whatsoever may be the 'history' of its formation or the earlier states of its elements. I suggest that it is useful to emphasize this 'radical' ahistoric genotype-conception of heredity in its strict antagonism to the transmission—or phenotype-view.
'The Genotype Conception of Heredity', The American Naturalist (1911), 45, 129.
Science quotes on:  |  Creation (211)  |  Genotype (3)  |  Heredity (51)  |  Structure (191)  |  Zygote (2)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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