ISBN: 9780217699495

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustra… Plus…

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...and not one factor. Emerson produced races with red seed and white cob, and vice versa (Fig. 58), showing that these two features are not necessarily linked together. There are also cases of what are called blends, which may result either from incomplete dominance or from the absence of any dominance. For example, it happens in the crossing of certain purple and white races of maize that the hybrid progeny has pinkish grains, which means an incomplete dominance of the purple. The classic illustration and the best one of blends is obtained from Andalusian fowls. There is a blue type of this race of fowls that never breeds true, and of course remained for a long time a puzzle to poultry fanciers. It was found that if two blue fowls were mated, only one-half of the progeny was blue, onefourth being black, and the other fourth splashed white. The black and white strains breed true, and when black and white strains are crossed all of the progeny are blue. This led to what was called the paradox in the case of this inheritance, namely, that black crossed with white produces twice as many blues as blue crossed with blue. This simply means that blue is not a character represented by a determiner, but appears only by bringing black and white together with no dominance of either. These are simple illustrations of the complications that arise, so that, although the fundamental law of heredity is simple, the interpretation of many cases becomes difficult. SUMMARY Mendel''s experiments dealt with very simple problems of inheritance, so that the more complex situations were not realized when his law was formulated. The more recent work in genetics has included complex situations, and as a result the application of Mendel''s law has often become so complex as to elude those... John Merle Coulter, Books, Science and Nature, Fundamentals of plant-breeding Books>Science and Nature This is an OCR edition without illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from GeneralBooksClub.com. You can also preview excerpts from the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Original Published by: D. A. Appleton and Company in 1914 in 374 pages; Subjects: Plant breeding; Nature / General; Nature / Birds & Birdwatching; Nature / Essays; Nature / Reference; Nature / Wildlife; Science / Life Sciences / Botany; Technology & Engineering / Agriculture / General; Technology & Engineering / Agriculture / Agronomy / General;<

ISBN: 0217699499

ISBN: 0217699499