Items related to Inheritance in silkworms (Volume 1)
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.1908 Excerpt: ... parents, as where all the young of a cross-mating between a tigerbanded larva, salmon cocoon race, as Italian Salmon, and a white larva white cocoon race as Chinese White, being tiger-banded larvae spinning salmon-colored cocoons. But these cases of coincidence in both larval and cocoon characters being those of either the father or the mother are really only coincidences in the possession by the one parent of the two dominant members of a double pair of allelomorphs. It is still the dominance of the character and not of the parent that determines the condition of the offspring as concerns the appearance or lying latent of the character in question. It is unfortunate that none of the adult characters has yet been found to be of the alternative Mendelian inheritance type, so that a comparison of the transmission of characters in all three stages, larval, pupal and imaginal, might be made. The adult variations in wingpattern and in the color and adhesiveness of the eggs are fluctuating and not alternative in character. Prepotency Of Sex And V1gor. It was desired to determine whether the dominance of a character in heredity could be weakened or destroyed by weakening or lessening the vigor of the parent representing the character, or whether in general any prepotency in heredity was due to vigor or sex. Experiments were begun, therefore, in 1904 by rearing certain individuals under conditions of short food and others of full food and making matings between these starvelings and full-fed vigorous individuals. The individuals used for experiment were selected so as to represent two races offering a Mendelian pair of allelomorphs both as to larval and cocoon characteristics. Examples of these 1904 matings and their results are as follows: A male starveling of rac...
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- PublisherGeneral Books LLC
- Publication date2012
- ISBN 10 1154052443
- ISBN 13 9781154052442
- BindingPaperback
- Number of pages32
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