Results 291 to 300 of about 803,632 (356)

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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Prospective chromosome analysis of 3429 amniocentesis samples in China using copy number variation sequencing

American Journal of Obstetrics and Gynecology, 2018
BACKGROUND: Next‐generation sequencing is emerging as a viable alternative to chromosome microarray analysis for the diagnosis of chromosome disease syndromes.
Jing Wang, Lin Chen, Cong Zhou, Li Wang, Hanbing Xie, Yuanyuan Xiao, Hongmei Zhu, Ting Hu, Zhu Zhang, Qian Zhu, Zhiying Liu, Shanling Liu, He Wang, Mengnan Xu, Zhilin Ren, F. Yu, D. Cram, Hongqian Liu   +17 more
semanticscholar   +1 more source

CHROMOSOME NUMBERS IN THE ANNONACEAE

American Journal of Botany, 1948
which had induced them. When isolated from the normal stem tissue and grown in vitro, the induced tumors lost their characteristic structure and reverted to the structureless condition of the original tumor tissue. The theory is put forward that induced tumors may be composite structures into the make-up of which both normal and tumor tissue enter, the
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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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Variation in the Human Chromosome Number

Nature, 1967
INCREASED aneuploidy has been described in cultured human peripheral blood cells, beginning in the sixth decade of life for females, and in the seventh decade of life for males1. This increased aneuploidy has been attributed largely to the presence of cells containing forty-five chromosomes, with an XO sex chromosome constitution.
A D, Bloom, P G, Archer, A A, Awa
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Chromosome Numbers of Dominican Compositae

Brittonia, 1970
Chromosome numbers of 34 species of Dominican Compositae in 26 genera and nine tribes are reported. First counts are given forCoreopsis buchii (2n = 64),Lagascea mollis (2n = 34),Spilanthes urens (n = 16),Liabum subacaule (n = 18),Eupatorium sciatraphes (2n = 40),Hieracium gronovii (2n = 18),Vernonia buxifolia (2n = 34),V.
Andrew M. Torres, Alain H. Liogier
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On the highest chromosome number in mammals

Cytogenetics and Cell Genetics, 2008
The mitotic and meiotic chromosomes of the semi-aquatic rodent Ichthyomys pittieri (Rodentia, Cricetinae) from Venezuela were analyzed by means of conventional staining and several banding techniques. The diploid chromosome number of this rare species is 2n = 92, which is the highest value known for mammals.
M, Schmid, A, Fernández-Badillo, W, Feichtinger, C, Steinlein, J I, Roman   +4 more
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Record Chromosome Number in a Mammal?

Nature New Biology, 1972
CROSS has reported1, 2 chromosome complements in rodents ranging up to 2n=84 (in the North American geomyid Geomys breviceps) and 2n=86 (in the heteromyid Dipodomys merriami). Matthey has contested3 this claim; he maintained that in Geomys bursarius 2n =70 or 72 and he doubted whether a higher number had been confirmed. Numbers in the 2n=70 to 80 range
W, George, B J, Weir
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A Chromosomal Break and Partial Delection of a Number 9 Chromosome

Human Heredity, 1973
A male infant was observed with a complex of un usual clinical abnormalities. Chromosomal studies revealed that the child was mosaic for a chromosomal fragment from the long arms of a number 9 chromosome. The majority of cells contained 46 chromosomes with a partially deleted number 9 chromosome and a chromosomal fragment.
G F, Smith, S, Sachdeva, P, Justice
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CHROMOSOME NUMBERS IN UMBELLIFERAE. II

American Journal of Botany, 1960
Bell, C. Ritchie (U. of North Carolina, Chapel Hill.), and Lincoln Constance. Chromosome Numbers in Umbelliferae. II. Amer. Jour. Bot. 47(1) : 24‐32. Illus. 1960.–Chromosome numbers are reported for plants representing an additional 100 taxa of Umbelliferae.
C. Ritchie Bell, Lincoln Constance
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