the purpose of this study was to investigate magnetic resonance imaging (mri) of the normal feline eyeand optic nerves using t1-weighted and t2-weighted images. a total of 6 healthy female domestic short haircats age 2-2.5 years and weighing 3.2 ± 0.4 kg were selected. magnetic resonance imaging data werecollected using gemsow (philips) at a magnetic field strength of 1.5 t. dorsal, sagittal, a...

PREDICTION of genetic segregation ratios from polyploids and polysomics is usually complicated by the necessity of simultaneous estimation of crossover frequencies and frequencies of the modes of anaphase I distribution. In a special hyperploid maize stock, the frequency of chiasma formation in one arm of a trivalent configuration and the relative frequencies of disjunctive and nondisjunctive d...

IN the optic nerve, chiasma, and tract the component most closely associated with the blood vessels is the neuroglia. It has become increasingly appreciated that in the brain and spinal cord the neuroglia has a dynamic role to play in metabolic processes, and is no longer to be regarded as primarily a supporting matrix; on the details of its association with the vascular system there is little ...

T h e use of telomeric C-bands in wheat-rye hybrids has made it possible to distinguish three types of wheat-wheat ( IBL) and wheat-rye associations (a, endto-end extremely distal; b , end-to-ed distal; and c, interstitial) between homoeologous chromosomes at different metaphase I stages (early, middle and late) and also to estimate the actual recombination frequencies for such associations at ...