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Xenopus embryos for in vivo studies of human disease gene function: Xenopus embryos are large and easily manipulated, and moreover, thousands of embryos can be obtained in a single day. Indeed, Xenopus was the first vertebrate animal for which methods were developed to allow rapid analysis of gene function using misexpression (by mRNA injection ...
The African clawed frog (Xenopus laevis), also known as simply xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the family Pipidae. Its name is derived from the short black claws on its feet. The word Xenopus means 'strange foot' and laevis means 'smooth'.
See also Xenopus#Model organism for biological research. Xenopus embryos and eggs are a popular model system for a wide range of biomedical research. [3] [13] This animal is widely used because of its powerful combination of experimental tractability and close evolutionary relationship with humans, at least compared to many model organisms. [13]
In the frog Xenopus laevis, the animal pole is heavily pigmented while the vegetal pole remains unpigmented. [4] A pigment pattern provides the oocyte with features of a radially symmetrical body with a distinct polarity. The animal hemisphere is dark brown, and the vegetal hemisphere is only weakly pigmented.
The African clawed frog or platanna, Xenopus laevis, was first widely used in laboratories in pregnancy assays in the first half of the 20th century.When human chorionic gonadotropin, a hormone found in substantial quantities in the urine of pregnant women, is injected into a female X. laevis, it induces them to lay eggs.
The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, protists, and other living organisms.This number, along with the visual appearance of the chromosome, is known as the karyotype, [1] [2] [3] and can be found by looking at the chromosomes through a microscope.
Pampa, a Jersey calf, was the first animal cloned in Argentina (by the company Bio Sidus) in 2002. [ 25 ] An Anatolian Grey bull (Efe) was cloned in Turkey in 2009 and four female calves from the same breed (Ece, Ecem, Nilüfer, Kiraz) in 2010 by the Scientific and Technological Research Council of Turkey (TÜBİTAK).
Xenops is a genus in the bird family Furnariidae, the ovenbirds.The genus comprises four species of xenops, all of which are found in Mexico, Central America and South America, particularly in tropical rain forests.