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Population structure (also called genetic structure and population stratification) is the presence of a systematic difference in allele frequencies between subpopulations.In a randomly mating (or panmictic) population, allele frequencies are expected to be roughly similar between groups.
Stratification (seeds), where seeds are treated to simulate winter conditions so that germination may occur Stratification (clinical trials), partitioning of subjects by a factors other than the intervention
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
It can produce a weighted mean that has less variability than the arithmetic mean of a simple random sample of the population. In computational statistics, stratified sampling is a method of variance reduction when Monte Carlo methods are used to estimate population statistics from a known population. [1]
Northern Hemisphere (septentrional, "of the seven plough-oxen", a reference to The Plough) northern rockling, Ciliata septentrionalis northern spleenwort, Asplenium septentrionale: septentrionalis – septentrionale: setosus: L: bristly or shaggy: hairy Atlantic spiny rat, Trinomys setosus; artic iris Iris setosa, Diadema setosum: setosus ...
A blotting method in molecular biology used to detect RNA in a sample. Compare Southern blotting, western blotting, and eastern blotting. nRNA See nuclear RNA. N-terminus. Also amine terminus and amino terminus. The end of a linear chain of amino acids (i.e. a peptide) that is terminated by the free amine group (–NH
Graphic breakdown of stratified random sampling. In statistics, stratified randomization is a method of sampling which first stratifies the whole study population into subgroups with same attributes or characteristics, known as strata, then followed by simple random sampling from the stratified groups, where each element within the same subgroup are selected unbiasedly during any stage of the ...
Anatomical terms are not included here and appear in sub-categories of the main Anatomy category. Initially, some alignment between this category and the article Glossary of biology was considered, but the inclusion criteria for the Glossary is substantially broader and encompasses terminology, concepts, objects and processes.