It may be carried as a somatic character, when it will be visible in the body tissues, or it may be carried as a gametic character, and its presence can only then be detected in subsequent generations, by adequately devised breeding tests.
Now such a gametic (egg or sperm) constitution can only result when two individuals, all or some of whose gametes are pure with regard to the character albinism, meet in fertilization.
The proportions in which the various coloured individuals appear are approximately those demanded by the Mendelian principle of gametic purity and segregation.
The four terms of the gametic series are first written horizontally across the four sets of four squares, so that the series is repeated four times.
The scheme also assumes either selective fertilization or, what amounts to the same thing, infertility of gametic unions where like sex chromosomes are present.
The evidence for the gametic interpretations of the self-colored fowl is derived from hybridizations.
Evidently the two sets of hens have a very different gametic constitution.
It is shown that each type of bird has a gametic formula that is constant for the type and which can be used with success to predict the outcome of particular combinations.
On account of imperfection of dominance decision as to gametic composition of any parent must largely rest on the make-up of the progeny.
The Black Game ("Black Devil") that I used in a few experiments seemed to have the same gametic formula as the Minorca, only the supermelanic coat was less dense.
The Gametic Composition of the Various Races 71 1.
To get an answer to the question it is necessary to find if there is, inside of any one table, among parents of the same gametic constitution, any such relation between parental and filial grades.
The Black Minorca and White-faced Black Spanish have the gameticformula CJNwx.
The grade of boot of the different parents varies largely because their gametic constitution is diverse.
The white Silkies that I have studied have the gametic formula cJnwx; i.
These two races afford the gametic formulæ CJNWx and CjnwX, respectively.
All attempts to explain adaptation by gametogenic mutations, or changes in gametic factors or 'genes,' have completely failed, as Bateson himself has admitted.
But the degree of development of a structure whose presence is due to gametic factors may very probably be modified by external stimulation, and the modification may become hereditary.
The development must therefore be more in the nature of gametic coupling.
What we have to consider and to investigate is whether the legs arose as a gametic mutation or as a direct result of locomotion on land.
The abnormalities are undoubtedly mutations ofgametic origin.
Absence of the gametic factor or factors for pigmentation results in albinism, and no amount of exposure to light produces pigmentation in albinos, e.
The fact that Proteus does not rapidly become as deeply coloured when exposed to light as ordinary Amphibia shows that the gametic factors for pigmentation have been modified as well as the somatic tissues.
Sidenote: O 1d] Illustration of the Theory of Gametic Purity in Mendelian Heredity in Mice.
In explaining the rise and fall of nations, gametic and personal causes can be measured and marked.
Heredity in Blue Andalusian Fowls, Gametic Purity in, Illustration of Theory of, O.
Sidenote: O 1f] Illustration of the Theory of Gametic Purity in Mendelian Heredity, in Blue Andalusian Fowls.
Blue Andalusian Fowls, Mendelian Inheritance inGametic Purity in Illustration of Theory of, O.
Mice, illustration of Theory of Gametic Purity in, O.
Gametic Purity in Mendelian Heredity, Theory of Illustrations of in Blue Andalusian Fowls, O.
It is evident that six kinds ofgametic matings are possible among individuals representing these various formulae.
The two organisms with the gameticconstitution RR and RA look alike, yet they are different in regard to heredity.
Let R denote round, A angular character; the pure breeds of parents have the gametic constitution RR and AA respectively.
In these cases certain of the possible combinations of factors occur in the gametic series with special frequency, being in excess, while the gametes representing other combinations are comparatively few.
If A and B are two factors which exhibit these phenomena we find that the gametic series of the double heterozygote differs according as the combination is made by crossing AB x ab, or by crossing AB x aB.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "gametic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
