336 results found

Search Results for: chromosome

Men could go extinct? Y chromosome disappearing slowly

Hold on to your seats, gentlemen -- the male chromosome (Y chromosome) disappearing at a certain rate could absolutely be... Read More

Chromosomes X and Y and Sex Determination

Reviewed by: Mary Anne Clark, Ph.D. In humans, the normal chromosome complement is 46, consisting of 22 pairs of... 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

Y chromosome

Definition noun, plural: Y chromosomes The male-determining sex chromosome particularly in humans and other... Read More

Submetacentric chromosome

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

X chromosome

Definition noun, plural: X chromosomes A mammalian sex chromosome which typically occurs in two in females and one in... Read More

Metacentric chromosome

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

Acrocentric chromosome

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

Subtelocentric chromosome

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

Sex chromosome

Definition noun, plural: sex chromosomes A type of chromosome in the genome that is involved in the determination of the sex... 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

Telocentric chromosome

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

Chromosome

Chromosomes Definition noun, plural: chromosomes. Word origin: Greek chroma ("color") + soma ("body"). What are... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Polytene chromosome

polytene chromosome (Science: cell biology) giant chromosomes produced by the successive replication of homologous pairs of... 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

Derivative chromosome

Derivative chromosome An anomalous chromosome generated by translocation. Synonym: translocation... Read More

Chromosome Mutations – II

Reviewed by: Mary Anne Clark, Ph.D. This page is a continuation of the previous tutorial, Chromosome Mutations... 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

DNA and the chromosome – varied targets for chemotherapy

Review DNA and the chromosome – varied targets for chemotherapy Stephanie M Nelson, Lynnette R Ferguson and William A... Read More

Univalent Chromosome

A chromosome that fails to pair with another during the prophase stage of meiosis, and therefore does not exchange genetic... Read More

Y linkage

Definition noun, plural: Y linkages (genetics) A form of sex linkage involving particularly the Y chromosome Supplement Sex... Read More

Triple-X syndrome

Definition noun A genetic condition in which a female has an extra X chromosome Supplement In humans, the sex chromosomes... Read More

X linkage

Definition noun, plural: X linkages (genetics) A form of sex linkage involving particularly the X chromosome Supplement The... 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

Quinacrine banding

Definition noun (cytogenetics) A chromosome banding method that treats chromosomes with quinacrine dihydrochloride to reveal... Read More

X-linked

Definition adjective (genetics) That which is associated with the X chromosome Supplement The term X-linked is defined as... Read More

Trisomy

Definition noun, plural: trisomies (genetics) A type of aneuploidy characterized by the gain of an extra copy of a... Read More

Klinefelter syndrome

Definition noun A genetic condition in a male characterized by the presence of at least one extra X chromosome Supplement In... Read More

Sex-linked trait

Definition noun, plural: sex-linked traits A trait genetically determined by an allele located on the sex... 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

Sex-determining Region Y gene

Definition noun The gene that codes for the SRY protein, which is associated with the testicular development in many male... Read More

Y-linked inheritance

Definition noun (genetics) Inheritance for genes on the Y chromosome Supplement Sex chromosomes are not only relevant... Read More

X-linked inheritance

Definition noun (genetics) Inheritance for genes on the X chromosome Supplement Sex chromosomes are not only relevant for... Read More

Chromosome rosette

Chromosome rosette right before metaphase, human chromosomes briefly form this single ring... Read More

Sex-linked gene

Definition noun, plural: sex-linked genes A gene located in the sex chromosome. Supplement In humans, the sex... Read More

Lampbrush chromosome

Lampbrush chromosome (Science: cell biology) large chromosomes (as long as 1mm), actually meiotic bivalents, seen during... Read More

Sex-linked disorder

Definition noun, plural: sex-linked disorders A genetic disorder caused by or linked to gene(s) located in the sex... Read More