chimaera meaning biology

[3], A chimera can also be an artifact of PCR amplification. It also covers population genetics, particularly gen.. It is usually considered to be a contaminant in transcript and expressed sequence tag (which results in the moniker of EST chimera) databases. Chimeras are generally considered a contaminant, as a chimera can be interpreted as a novel sequence while it is in fact an artifact. Revisit some of the ecosystems you.. Weaving cartilage at zero g: the reality of tissue engineering in space, The chimeric eukaryote: Origin of the nucleus from the karyomastigont in amitochondriate protists. It occurs when the extension of an amplicon is aborted, and the aborted product functions as a primer in the next PCR cycle. The former may be produced when a fertilized egg generated through parthenogenesis (a form of asexual reproduction) fuses with a normal zygote. These individuals are produced when blood anastomoses (connections) form between the placentas of dizygotic twins, thereby enabling the transfer of stem cells between the developing embryos. The latter is known to occur with sequencing of electrophoresis gels.[5]. Before using our website, please read our Privacy Policy. The chimera was generated from a host embryo and embryonic stem cells, resulting in albino (white skin and pink eye) and brown skin (with black eye) characteristics. In genetics and molecular biology, a chimera is a single DNA sequence originating from multiple transcripts or parent sequences. (For information on the phenomenon in plants, see chimera.). It is not intended to provide medical, legal, or any other professional advice. All Rights Reserved. For other uses, see, National Center for Biotechnology Information, "Tentative Mapping of Transcription-Induced Interchromosomal Interaction using Chimeric EST and mRNA Data", "EST Assembly for the Creation of Oligonucleotide Probe Targets", "Chimeric 16S rRNA sequence formation and detection in Sanger and 454-pyrosequenced PCR amplicons", "Sequencing a Genome, part VI: Chimeras are not just funny-looking animals | ScienceBlogs", "Chimera checking sequences with QIIME — Homepage", "removeBimeraDenovo function | R Documentation", "Bellerophon: a program to detect chimeric sequences in multiple sequence alignments", "Entrez Gene: CYP2C18 cytochrome P450, family 2, subfamily C, polypeptide 18",, Short description with empty Wikidata description, Articles needing expert attention with no reason or talk parameter, Articles needing expert attention from May 2009, Genetics articles needing expert attention, Creative Commons Attribution-ShareAlike License, CHECK_CHIMERA of the Ribosomal Database Project, "The first mRNA transcript isolated for..." the human gene, CYP2C17 was thought to be a human gene, but " now considered an artefact based on a chimera of, Researchers have created receptor chimeras in their studies of, This page was last edited on 15 September 2020, at 09:20. Kara Rogers is the senior editor of biomedical sciences at Encyclopædia Britannica, where she oversees a range of content from medicine and genetics to microorganisms. She joined Britannica in 2006 and... A chimeric mouse with its pups. While human parthenogenetic chimeras seem improbable, scientists reported one such case in 1995. Chimera (Science: cell biology) organism composed of two genetically distinct types of cells. Parthenogenesis in nature generally is limited to lower plants and invertebrates and is prevented in mammals by genomic imprinting (parentally determined gene expression). Can be formed by the fusion of two early blastula stage embryos or by the reconstitution of the bone marrow in an irradiated recipient or by somatic segregation. In genetics and molecular biology, a chimera is a single DNA sequence originating from multiple transcripts or parent sequences. However, mammalian parthenogenetic chimeras have been developed experimentally and are commonly used for the study of developmental genetics. Corrections? The term is derived from the Chimera of Greek mythology, a fire-breathing monster that was part lion, part goat, and part dragon.

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