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Two-colored rose chimera. A genetic chimerism or chimera (/ k aɪ ˈ m ɪər ə / ky-MEER-ə or / k ɪ ˈ m ɪər ə / kim-EER-ə) is a single organism composed of cells with more than one distinct genotype. Animal chimeras can be produced by the fusion of two (or more) embryos.
When the egg (carrying X M), is fertilized by a sperm (carrying a Y or an X P) a diploid zygote forms. From zygote, through adult stage, to the next generation of eggs, the X chromosome undergoes the following changes: Xi P Xi M zygote → undergoing zygotic genome activation, leading to: Xa P Xa M → undergoing imprinted (paternal) X ...
A human chimera is a human with a subset of cells with a distinct genotype than other cells, that is, having genetic chimerism.In contrast, an individual where each cell contains genetic material from a human and an animal is called a human–animal hybrid, while an organism that contains a mixture of human and non-human cells would be a human-animal chimera.
In molecular biology, and more importantly high-throughput DNA sequencing, a chimera is a single DNA sequence originating when multiple transcripts or DNA sequences get joined. Chimeras can be considered artifacts and be filtered out from the data during processing [ 1 ] to prevent spurious inferences of biological variation. [ 2 ]
A laboratory technique involving the use of a microscopic lance or nanopipette (typically about 100 nanometres in diameter) in the presence of an electric field in order to deliver DNA or RNA directly into a cell, often a zygote or early embryo, via an electrophoretic mechanism. While submerged in a pH-buffered solution, a positive electric ...
The fusion of fluorescent tags to proteins in a host cell is a widely popular technique used in experimental cell and biology research in order to track protein interactions in real time. The first fluorescent tag, green fluorescent protein (GFP), was isolated from Aequorea victoria and is still used frequently in modern research.
This test question appeared on a Luther Burbank High School biology final in June 2024. Student names were obscured by the sources who provided the images to the Sacramento Bee.
Single-zygote chimeras occur not only in plants, but also in animals, correct? [ edit ] The introduction contains this sentence: "In plant chimeras, however, the distinct types of tissue may originate from the same zygote, and the difference is often due to mutation during ordinary cell division."