By E.W. Caspari (Ed.)
This quantity in a sequence on genetics, emphasizes the variety of genetic reports. Articles conceal the filamentous fungus neurospora, biogenesis of yeast ribosomes, evolutionary genetics of fish, drosophila transposable parts and the dropophila gene zeste.
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Extra info for Advances in Genetics, Vol. 19
These values vary slightly according to the method used for the choosing of “random” samples of sectors: yellow nondisjunctional sectors are conspicuous and easier to identify than green crossover sectors, so that the former are isolated preferentially when “all” sectors are counted rather than the “first” large one from each colony. 5% nondisjunctionals was obtained among suA/suA diploid segregants (120/1883 sectors tested). For the right arm of group I , nondisjunctional types among yellow segregants, selected as single heads from colonies of various diploids on CM, seem to show a lower frequency, which generally ranges from 1 to 6% (see y A / y A segregants in Tables 10 and 12).
From 68c 1 2 24 24 23 48 Oc 23 27 15. 29 29 22 20 37 10 33 28 18 25 21 (8) 21 9' (12) C M pfp Total No. 25 Homolog with reduced recovery. 99 * Small chartreuse or haploid green color segments are difficult to detect in the light green heterozygous triploid. + Ratios distorted in sample from CM pfp, which selects for fpaB on Ia, and against phenA on IIIb. d x2 refers to haploids from C M only. c Significant deviations from expected random recovery. 86 71 157 p r 0 P z 3 0 2 P P '1 3. c1 80 ETTA KAFER and VII.
I n addition, most triploid colonies produced one or two color patches or segments large enough to be seen by the naked eye (see Fig, 7b) compared to 1-2 per 100 diploid colonies (Wood and Kafer, 1969) (Fig. 7a), and practically all of these resulted from chromosome loss. 7. Low-density platings of conidia on complete medium: (a) diploid; (b) triploid. 8. Shape and arrangement of conidial heads permitting visual classification of (a) diploids, (b) triploids, as well as (c) haploid segregants. 78 ETTA KAFER streaking, and the resulting stable types were tested for markers and for ploidy (285 segregants from 145 triploid-looking colonies, Table 14).
Advances in Genetics, Vol. 19 by E.W. Caspari (Ed.)