منابع مشابه
Statistical analysis of ordered tetrads.
Ordered tetrad data yield information on chromatid interference, chiasma interference, and centromere locations. In this article, we show that the assumption of no chromatid interference imposes certain constraints on multilocus ordered tetrad probabilities. Assuming no chromatid interference, these constraints can be used to order markers under general chiasma processes. We also derive multilo...
متن کاملAlgebraic Factor Analysis: Tetrads, Pentads and Beyond
Factor analysis refers to a statistical model in which observed variables are conditionally independent given fewer hidden variables, known as factors, and all the random variables follow a multivariate normal distribution. The parameter space of a factor analysis model is a subset of the cone of positive definite matrices. This parameter space is studied from the perspective of computational a...
متن کاملOrdered Linear Tetrads Are Produced by the Sporulation of Newly Formed Zygotes of Saccharomyces cerevisiae.
Diploid Saccharomyces cerevisiae strains normally sporulate to produce tetrahedral unordered asci containing four spores (tetrads). We report that when newly formed zygotes are subjected to the same sporulation conditions, they form predominantly linear ordered tetrads. We show that the two spores from each end of such a linear tetrad invariably contain nonsister centromeres. Spore viability, r...
متن کاملAnalysis of Tetrads from the yeast Saccaromyces cerevisiae
When normally haploid yeast cells of two different mating types encounter each other, they fuse to form a diploid zygote (this constitutes a cross), which immediately undergoes meiosis to regenerate four individual haploid spores – a tetrad (the equivalent of an F1 generation). Since each meiotic tetrad is contained in a sac-like structure called an ascus, it can be recovered as an intact group...
متن کاملStatistical analysis of immigrants to Abyssinia
immigration to Abyssinia, which took place at the beginning of the official invitation of the Prophet (PBUH) in the fifth year of the Besat, is of the most important events in the history of Islam. There are few historical documents of this immigration. Lack of information has prevented proper historical research about this immigration. Hence, the causes, manner and consequences of immigrating ...
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ژورنال
عنوان ژورنال: Genetics
سال: 1998
ISSN: 1943-2631
DOI: 10.1093/genetics/150.1.459