51 results found

Search Results for: centromere

Centromere

Definition noun, plural: centromeres The dense, constricted region containing highly-specialized repetitive DNA sequence,... Read More

Subtelocentric chromosome

Definition noun, plural: subtelocentric chromosomes A chromosome whose centromere is placed near the end rather than the... Read More

Acrocentric chromosome

Definition noun, plural: acrocentric chromosomes A chromosome whose centromere is subterminal resulting in its q arms being... Read More

Homologous chromosome

A homologous chromosome pertains to one of a pair of chromosomes with the same gene sequence, loci, chromosomal length, and... Read More

Telocentric chromosome

Definition noun, plural: telocentric chromosomes A chromosome whose centromere is placed very close to the end of the... Read More

Metacentric chromosome

Definition noun, plural: metacentric chromosomes A chromosome in which the centromere is located in the middle resulting in... Read More

Submetacentric chromosome

Definition noun, plural: submetacentric chromosomes A chromosome with a centromere located sub-median resulting in slightly... Read More

Holocentric chromosome

Definition noun, plural: holocentric chromosomes A chromosome in which the entire length of the chromosome seems to act as a... Read More

Metaphase I

Definition noun The second stage in the first meiotic division after prophase I, and highlights the alignment of paired... Read More

Kinetochore

Definition noun, plural: kinetochores A protein complex that assembles at the centromeric region of the chromosome during... Read More

Paracentric inversion

Definition noun, plural: paracentric inversions (genetics) An inversion of a segment of chromosome in which the centromere... Read More

Prometaphase

Definition noun The phase of mitosis between prophase and metaphase wherein the nuclear envelope breaks down and form... Read More

Pericentric inversion

Definition noun, plural: pericentric inversions (genetics) An inversion of a segment of chromosome in which the centromere... Read More

Meiosis and Alternation of Generations

Review of Mitosis: Cell Cycle The cell cycle contains the process in which cells are either dividing or in between... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More

Anaphase I

Definition noun The third stage in the first meiotic division after prophase I, and highlights the separation of paired... Read More

Satellite DNA

Definition noun, plural: satellite DNAs (molecular biology) A portion of the DNA of a genome consisting of tandemly... Read More

Minisatellite

Definition noun, plural: minisatellites (molecular biology) A tandem repeat ranging in length from 10 to 60 base pairs,... Read More

Chromosome 2

Definition noun In humans, the autosome that is considered as the second-largest, spanning more than 242 million base pairs,... Read More

Chromosomal inversion

Definition noun, plural: chromosomal inversions A chromosomal aberration wherein a segment of a chromosome is reversed... Read More

Genetic Information and Protein Synthesis

Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More

Large-scale mutation

Definition noun, plural: large-scale mutations (genetics) A type of mutation several nucleotides of a gene within a large... Read More

Metaphase II

Definition noun The second stage in meiosis II after prophase II, and highlights the alignment of chromosomes along a single... Read More

Chromosome Mutations

Reviewed by: Mary Anne Clark, Ph.D. By nature, the genetic information from both parents is expected to be seen... Read More

Constitutive heterochromatin banding

Definition noun (cytogenetics) A selective banding technique wherein a banding pattern is produced in the constitutive... Read More

Mitosis

Mitosis Definition What is mitosis? In biology, mitosis refers to the cellular process where a single cell divides... Read More

Chromatid

Definition noun, plural: chromatids Either one of the two strands joined together by a single centromere, formed from the... Read More

Chromatids

Definition noun, singular: chromatid The two strands joined together by a single centromere, formed from the duplication of... Read More

Zygotene

Definition noun, plural: zygotenes The sub-stage of prophase I of meiosis I in which the homologous chromosomes pair or come... Read More

Pachytene

Definition noun The stage after zygotene and precedes diplotene, and is highlighted by homologous chromosomes shortening,... Read More

Inversion

Definition noun, plural: inversions (general) The reversal of state, form, position, direction, order, or course, such as... Read More

Meiosis

What is Meiosis? A simple definition of meiosis would be is this: meiosis is the process of cell division that results in... Read More

Dinoflagellate

A dinoflagellate is a flagellate algae characterized by their two flagella of unequal length. One of the flagella is lying... Read More

Haploid

In biology, haploid pertains to a condition, a cell, or an organism that has half of the usual complete set of chromosomes... Read More

Plant Cells vs. Animal Cells

Plant Cells Most cells are not visible with the naked eye. However, with microscopes of various types, plant cells can be... Read More

Microsatellite

Definition noun, plural: microsatellites (molecular biology) A tandem repeat ranging in length from 1 to 6 base pairs,... Read More

Cytoskeleton

Definition noun plural: cytoskeletons cy·to·skel·e·ton (cell biology) The lattice or internal framework of a cell... Read More

Homologous

Homologous Definition What is homologous? In general science, the word “homologous” is used to show a degree of... Read More

Mitotic spindle

Definition noun The collective term for all the spindle fibers that form during mitosis Supplement The spindle apparatus is... Read More

Patau syndrome

Definition noun A genetic disorder caused by genetic changes in chromosome 13, such as an extra copy of chromosome 13... Read More