Results 241 to 250 of about 402,124 (270)

Chromosome numbers inCrocus

Genetica, 1959
1. SevenCrocus species collected in natural habitats have been examined for chromosome numbers, three of them for the first time. 2. An up-to-date list of 80Crocus species arranged in taxonomic groups (divisions, sections), according toMaw, is given as an addendum, and the available chromosome numbers are cited. 3.
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Chromosome Number of Marsilea [PDF]

Nature, 1958
THE genus Marsilea has not previously been investigated by modern cytological methods, and we have only the early investigations of Strasburger1 and de Litardiere2 using techniques which experience has shown3 to be unreliable when applied to ferns. It is therefore perhaps of importance to record a clear count of n = 20 (see Fig.
D. S. Loyal, P. N. Mehra
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CHROMOSOME NUMBERS IN THE MYRTACEAE

American Journal of Botany, 1947
THE MYRTACEAE have received comparatively little cytological attention, partly because of technical difficulties, and partly because the majority of species are relatively far removed from the centers of intensive study. Cytology in its more recent developments has proved its value in clarifving some of the problems of phylogeny, and it appeared likely
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Chromosome Numbers of Slugs

Nature, 1960
CHROMOSOME numbers are becoming increasingly part of the taxonomic descriptions of animal and plant species.
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Chromosome number 18

Human Genetics, 1973
4 cases of “? chromosome abnormality”, referred to this department in the past 3 months, have shown an aberrant complement of chromosome 18. Chromosome 18 has been identified using a modification of Seabright's (1971) method of banding human chromosomes.
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Chromosome Numbers in the Bombacaceae

Botanical Gazette, 1968
Cytological characteristics of the Bombacaceae include the persistence of the nucleolus through mitotic division and high chromosome numbers. Counts are listed for 17 species in 10 genera. Most numbers are based on x = 36.
H. G. Baker, I. Baker
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Chromosome Number and Chromosome Morphology in Helicophyllum crassipes

Nature, 1951
Helicophyllum crassipes (Araceae)1 grows as a weed in the coastal belt of Egypt, in localities where the soil is light calcareous sand and where the percentage of salt is low. It is a corm-geophyte which sprouts late in October and flowers during January and February; flowering sometimes extends through March and April.
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Symbols for Chromosome Numbers

Nature, 1934
IN a paper on the chromosomes of Chrysanthemum, Shimotomai1 pointed out the need for a special symbol to represent the basic number of chromosomes in genera containing polyploid species. He suggests, however, that n should be used for this purpose, and 2 being introduced as new symbols for the gametic and zygotic numbers of chromosomes respectively in ...
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Chromosome Numbers of Cerastium Species

Nature, 1950
THE chromosomes of four species of Cerastium, namely, C. vulgatum, C. alpinum (including C. alpinum lanatum), C. arvense and C. perfoliatum, have been counted from root-tips of young seedlings. I give here a list of chromosome counts made by previous workers, none of which is of British material, together with my own counts.
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Chromosome Numbers of the Blattaria

Annals of the Entomological Society of America, 1970
The numbers of chromosomes of 106 species (62 genera) of Blattaria are given; the numbers for 84 species are reported for the first time. The numbers vary greatly in the suborder and range from n ♀ = 8 to n ♀ = 40. Differences in number occur also between species of a given genus. The most frequently occurring haploid number is 19.
Samuel H. Cohen, Louis M. Roth
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