ISBN: 9781130146998

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 132 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.This historic book may have numerous typos and missing text. Pur… Mehr…

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 132 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.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: . . . been so blind. Thus, for example, the type jaunty having been recognized, suddenly in certain other stocks wings that have been passed over as imperfectly unfolded or only vaguely recognized as queer are seen to be sharply characterized jaunties. Again, of the 20 or so mutations previously found it had happened that only 2, rudimentary and truncate, bore much resemblance to each other, and we were then far less critical than now as to whether a new jaunty-like mutation was actually jaunty or only a mimic. To the genus jaunty there are now at least four well recognized species--jaunty, jaunty X (sex-linked), curled, and California curled. A similar mutating period for purple resulted in isolation of maroon as a distinct but very close mimic and the mutating period of arc brought forth arch, bow, arc2, depressed, and even other types distinct in inheritance though similar in appearance (arcoids). Table 23. --Pi, jaunty 9 X black; Pi wild-type 99 Pi wild-type cTcf. CHROMOSOME AND LOCUS OF JAUNTY. The fact that the gene for jaunty is carried by the second chromosome appeared in the F2 from the cross of a jaunty female to a black male, when a mass-culture of the Fi wild-type males and females gave a 2: 1: 1: 0 F2 ratio (table 23). The F2 jaunty flies were mated to the F2 blacks, this being considered the most advantageous method of working for the double recessive black jaunty. In F3 only wild-type flies appeared. The blacks or jaunties, which would have indicated crossing-over (in the Ft female) between black and jaunty, and which, indeed, would have given black-jaunty stock in F4, did not appear. Accordingly these wild-type flies, F3 offspring, which were like the . . . This item ships from La Vergne,TN., RareBooksClub<