micronucleus वाक्य
उदाहरण वाक्य
मोबाइल
- As a ciliate, " C . uncinata " has cilia covering its body and a dual nuclear structure, the micronucleus and macronucleus.
- Ciliates contain two nucleus types : a macronucleus that is primarily used to control metabolism, and a micronucleus which performs reproductive functions and generates the macronucleus.
- Food vacuoles 2 ) micronucleus 3 ) oral groove 4 ) gullet 5 ) anal pore 6 ) contractile vacuole 7 ) macronucleus 8 ) cilia . ]]
- In " Tetrahymena ", the micronucleus has 10 chromosomes ( 5 per haploid genome ), while the macronucleus has over 20, 000 chromosomes.
- Ciliates are also capable of sexual reproduction, and utilize two nuclei unique to ciliates : a macronucleus for normal metabolic control and a separate micronucleus that undergoes meiosis.
- Many micronucleus assays have been developed to test for the presence of these structures and determine their frequency in cells exposed to certain chemicals or subjected to stressful conditions.
- The cytokinesis-block micronucleus ( CBMN ) assay was first developed to score micronuclei in cells that completed nuclear division by blocking them at the binucleate stage before cytokinesis.
- There is apparently little, if any, DNA damage in the new macronucleus, suggesting that rejuvenation is associated with the repair of these damages in the micronucleus during meiosis.
- This species can be distinguished from its congeners by its large body size and the shape of the macronucleus; this species'micronucleus is located situated in a small macronuclear concavity.
- Unlike most other eukaryotes, ciliates have two different sorts of nuclei : a tiny, diploid micronucleus ( reproduction ), and a large, polyploid macronucleus ( general cell regulation ).
- The major drawback of using micronucleus tests is that they cannot determine different types of chromosomal aberrations and can be influenced by the mitotic rate and proportion of cell death, skewing the results.
- In particular, the CBMNcyt ( cytokinesis-block micronucleus cytome ) assay is extremely versatile and is one of the preferred methods to measure the level of chromosomal damage and chromosomal instability in cells.
- Homozygous mutant animals were infertile, did not have a pinna reflex, had a moderate degree of hearing impairment, abnormal cornea morphology, lens morphology and cataracts, and displayed chromosomal instability in a micronucleus test.
- "' Micronucleus "'is the name given to the small nucleus that forms whenever a chromosome or a fragment of a chromosome is not incorporated into one of the daughter nuclei during cell division.
- Genetic Toxicologists at IITRI routinely perform bacterial mutagenesis assays ( Ames Tests ), mammalian mutagenesis assays ( mouse lymphoma and other tests ), DNA damage assays ( micronucleus and chromosomal aberration assays ), and cytotoxicity assays.
- Only beneficial mutations that occur in the germline micronucleus of " T . thermophila " are passed down between generations, but these mutations would never be selected for environmentally in the parental cells because they are not expressed.
- The micronucleus genome contains five chromosomes that undergo mitosis during micronuclear division and meiosis during life cycle during conjugation, allowing it to be site-specific, and a new macronucleus differentiates from a mitotic descendant of the conjugated micronucleus.
- The micronucleus genome contains five chromosomes that undergo mitosis during micronuclear division and meiosis during life cycle during conjugation, allowing it to be site-specific, and a new macronucleus differentiates from a mitotic descendant of the conjugated micronucleus.
- These findings suggest that clonal aging is due, in large part, to a progressive accumulation of DNA damage ( see DNA damage theory of aging ); and that rejuvenation is due to the repair of this damage in the micronucleus during meiosis.
- _When a variety of cultured animal cells were exposed to radiation from cell phones to see if it caused cancer-inducing genetic damage, only one test battery, known as a micronucleus assay, produced a negative result on one type of human white blood cells.
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