The book Heredity was written by author James a S James Anderson Scott Watson Here you can read free online of Heredity book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Heredity a good or bad book?
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The domestic animals must have been selected for certain valuable characters at the outset, and these characters have been slowly improved, either by the accumulation of small variations or by the gradual building up of certain factor combinations. Under these circumstances we must expect simple relations only rarely. The heredity of economic factors will usually be a complex matter. For example, certain breeds of sheep, such as the Merino, have been selected for fineness of wool. Others, such ...as the Lincoln, have been selected, among other points, for a long and coarser type of wool. Actually, Lincoln wool may be four or five times as long, and about twice as thick as Merino. If these two breeds are crossed, as they frequently are, the hybrid is about intermediate, and in the subsequent generations there is no obvious segre- gation into Merino and Lincoln types. The second generation is probably more variable than the first, but in any case we have a highly complex relationship. Our theory is not yet perfect enough to deal with such matters.
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