The Physical Basis of Heredity

Abstract

A great deal is known about the behaviour of geredity characters and the manner in which they are inherite.Take the example of a cross between a red cow and a black bull. All the progeny are black.By mating two of these we get a geration consisting of three black to one red :to account for this ,it is sugggested that two factures in the germplasm acting together form a character. The original red cow had two for red and the black.bull had two,and each parent contributes equally to the breeding (genetic)composition of the offspring.Therefore, one factor goes from each parent.The factor for black,however ,domonates that for red,and the animal appears black.Its breeding composition is not like that of its black father,but is mixed, having one factor for red and another for black.And so,if you mate two such animals together, you get appearing in the third generation, 3black,only one of which has both factors for black and will breed true. the others.being like their immediate parents (heterozygous);you get also one red.and this will bread (being) homozygons).

DOI

https://doi.org/10.29321/MAJ.10.002019

Pages

71 - 75

Creative Commons

Copyright

© The Author(s), 2026. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

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