Results 281 to 290 of about 821,591 (309)
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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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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 NUMBERS IN THE MYRTACEAE
American Journal of Botany, 1947THE 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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Nature, 1960
CHROMOSOME numbers are becoming increasingly part of the taxonomic descriptions of animal and plant species.
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CHROMOSOME numbers are becoming increasingly part of the taxonomic descriptions of animal and plant species.
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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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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, 1968Cytological 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, 1951Helicophyllum 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, 1934IN 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, 1950THE 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, 1970The 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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Chromosome Numbers in Menispermaceæ
Nature, 1934IN a recent communication to NATURE1, entitled, “Origin of the Angiosperms”, Dr. Anderson puts forward the interesting suggestion of the possible origin of modern flowering plants through the Magnoliales from wide crosses between different groups of Gymnosperms showing 12 and 7 as the base number of their chromosomes, such as the modern Ginkgoales ...
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