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. 1919 Excerpt: ...any egg (X) by a F-bearing sperm produces a male (XF). Since the two kinds of spermatozoa are produced in equal numbers, females and males will be equal in number. The mechanism is self-perpetuating. The Inheritance Of Factors Carried By The SexChromosomes In The Drosophila Type Since the son gets his one X-chromosome ...
Read More
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. 1919 Excerpt: ...any egg (X) by a F-bearing sperm produces a male (XF). Since the two kinds of spermatozoa are produced in equal numbers, females and males will be equal in number. The mechanism is self-perpetuating. The Inheritance Of Factors Carried By The SexChromosomes In The Drosophila Type Since the son gets his one X-chromosome from his mother, and the Y from his father, he inherits factors carried by the sex-chromosomes in a different way from the way in which he inherits the factors carried by the other chromosomes (autosomes), because X and Y differ from each other in a way in which no other chromosomes differ. The recessive gene for white eyes (w) in Drosophila is carried by the X-chromosome. It is inherited in the following way (Fig. 69): When a male with white eyes (w) is mated to a red-eyed female (WW), the Fa sons and daughters have red eyes. When these are bred to each other, all the daughters have red eyes (50 per cent.), half the sons have red eyes (25 per cent.) and half the sons have white eyes (25 per cent.). The ratio, irrespective of sex, is three red to one white, but the white-eyed flies are found only amongst the males. In the diagram (Fig. 69), the relation of these results to the sex-chromosomes is shown. The X-chromosome that carries the normal gene (wild type) which gives red eyes is indicated by W. The X-chromosome that carries the. gene for white eyes is indicated by w. The rod with a bent end stands for the F-chromosome. The Fj daughters contain one of each kind of X-chromosome. The Fj sons only one kind. The recombinations that give the F2 results are shown in the middle of the lower part of the diagram. Half of the females are seen to be homozygous1 for the wild-type gene (W). They should never transmit white eyes, and they do not. The oth...
Read Less
Add this copy of The Physical Basis of Heredity to cart. $19.71, poor condition, Sold by Anybook rated 4.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1919 by J. B. Lippincott Company.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In poor condition, suitable as a reading copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 650grams, ISBN:
Add this copy of The Physical Basis of Heredity to cart. $20.57, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of The Physical Basis of Heredity to cart. $25.29, new condition, Sold by Ebooksweb rated 3.0 out of 5 stars, ships from Bensalem, PA, UNITED STATES, published 2010 by Nabu Press.
Add this copy of The Physical Basis of Heredity (Paperback Or Softback) to cart. $25.37, new condition, Sold by BargainBookStores rated 3.0 out of 5 stars, ships from Grand Rapids, MI, UNITED STATES, published 2019 by Wentworth Press.
Add this copy of The Physical Basis of Heredity to cart. $30.01, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of The Physical Basis of Heredity (Hardback Or Cased Book) to cart. $38.07, new condition, Sold by BargainBookStores rated 3.0 out of 5 stars, ships from Grand Rapids, MI, UNITED STATES, published 2019 by Wentworth Press.
Add this copy of The Physical Basis of Heredity to cart. $41.35, new condition, Sold by Media Smart rated 3.0 out of 5 stars, ships from Hawthorne, CA, UNITED STATES, published 2019 by Wentworth Press.
