Ploidy (/ ˈ p l ɔɪ d i /) is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes.Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as.

An allele (UK: / ˈ æ l iː l /, / ə ˈ l iː l /; US: / ə ˈ l iː l /; modern formation from Greek ἄλλος állos, "other") is a variation of the same sequence of nucleotides at the same place on a long DNA molecule, as described in leading textbooks on genetics and evolution. "The chromosomal or genomic location of a gene or any other genetic element is called a locus (plural: loci ...

Virtually all infections with rabies resulted in death until two French scientists, Louis Pasteur and Émile Roux, developed the first rabies vaccination in 1885.Nine-year-old Joseph Meister (1876–1940), who had been mauled by a rabid dog, was the first human to receive this vaccine. The treatment started with a subcutaneous injection on 6 July 1885, at 8:00 pm, which was …

Molar pregnancies usually present with painless vaginal bleeding in the fourth to fifth months of pregnancy. The uterus may be larger than expected, or the ovaries may be enlarged. There may also be more vomiting than would be expected (hyperemesis).Sometimes there is an increase in blood pressure along with protein in the urine. Blood tests will show very high levels of human …

The yeast Saccharomyces cerevisiae is a simple single-celled eukaryote with both a diploid and haploid mode of existence. The mating of yeast only occurs between haploids, which can be either the a or α (alpha) mating type and thus display simple sexual differentiation. Mating type is determined by a single locus, MAT, which in turn governs the sexual behaviour of both haploid …

The regular hexagon has D 6 symmetry. There are 16 subgroups. There are 8 up to isomorphism: itself (D 6), 2 dihedral: (D 3, D 2), 4 cyclic: (Z 6, Z 3, Z 2, Z 1) and the trivial (e) . These symmetries express nine distinct symmetries of a regular hexagon. John Conway labels these by a letter and group order. r12 is full symmetry, and a1 is no symmetry.p6, an isogonal …

Von Diploidie (altgriechisch διπλόος diplóos ‚zweifach‘, Plural διπλοῖ diploĩ ‚zweifachige‘) wird in der Genetik gesprochen, wenn in einem Zellkern einer eukaryoten Zelle ein zweifacher Chromosomensatz (2n) vorliegt.Dessen Zahl an Chromosomen ist das Zweifache (Doppelte) eines einfachen Chromosomensatzes (1n).Zellen mit solchen Zellkernen sind diploid.

WI-38 is a diploid human cell line composed of fibroblasts derived from lung tissue of a 3-month-gestation female fetus. The fetus came from the elective abortion of a Swedish woman in 1963. She was disinterested in the fate of the fetus and its subsequent use in benefitting billions. The cell line was isolated by Leonard Hayflick the same year, and has been used extensively in …

Diploid (gr. διπλος ‘podwójny’) – komórka lub organizm zawierający w swoim genomie podwójny zestaw chromosomów homologicznych.Oznaczany jest jako 2n.. U organizmów rozmnażających się płciowo jeden z nich zazwyczaj pochodzi od matki, zaś drugi od ojca. Większość eukariontów (szczególnie wyższych) jest diploidalna.. Zobacz też. ploidia

Ginkgo is a genus of non-flowering seed plants.The scientific name is also used as the English name. The order to which it belongs, Ginkgoales, first appeared in the Permian, 270 million years ago, and is now the only living genus within the order. The rate of evolution within the genus has been slow, and almost all its species had become extinct by the end of the Pliocene.