Definitions for polysomy
po·lysomy

Princeton's WordNetRate this definition:4.0 / 1 vote

1. polysomynoun

   congenital defect of having one or more extra chromosomes in somatic cells

WiktionaryRate this definition:0.0 / 0 votes

1. polysomynoun

   The condition of being polysomic

WikipediaRate this definition:0.0 / 0 votes

1. Polysomy

   Polysomy is a condition found in many species, including fungi, plants, insects, and mammals, in which an organism has at least one more chromosome than normal, i.e., there may be three or more copies of the chromosome rather than the expected two copies. Most eukaryotic species are diploid, meaning they have two sets of chromosomes, whereas prokaryotes are haploid, containing a single chromosome in each cell. Aneuploids possess chromosome numbers that are not exact multiples of the haploid number and polysomy is a type of aneuploidy. A karyotype is the set of chromosomes in an organism and the suffix -somy is used to name aneuploid karyotypes. This is not to be confused with the suffix -ploidy, referring to the number of complete sets of chromosomes. Polysomy is usually caused by non-disjunction (the failure of a pair of homologous chromosomes to separate) during meiosis, but may also be due to a translocation mutation (a chromosome abnormality caused by rearrangement of parts between nonhomologous chromosomes). Polysomy is found in many diseases, including Down syndrome in humans where affected individuals possess three copies (trisomy) of chromosome 21.Polysomic inheritance occurs during meiosis when chiasmata form between more than two homologous partners, producing multivalent chromosomes. Autopolyploids may show polysomic inheritance of all the linkage groups, and their fertility may be reduced due to unbalanced chromosome numbers in the gametes. In tetrasomic inheritance, four copies of a linkage group rather than two (tetrasomy) assort two-by-two.

ChatGPTRate this definition:0.0 / 0 votes

1. polysomy

   Polysomy is a genetic condition where an individual has more than the typical number of chromosomes within their cells. While the norm is to have two copies of each chromosome (one from the mother and one from the father), polysomy refers to the presence of three or more copies of a particular chromosome. This causes various physical and developmental abnormalities depending on which chromosome is involved.

WikidataRate this definition:2.0 / 1 vote

1. Polysomy

   Polysomy is a condition in which an otherwise diploid organism has at least one more chromosome than normal, i.e. the number of a particular chromosome is not diploid - there may be three or more copies of the chromosome rather than the expected two copies. Polysomy is usually caused by non-disjunction during meiosis, but may also be due to a translocation mutation. Down syndrome in humans is an example of polysomy where affected individuals possess three copies of chromosome 21.

Matched Categories

1. • Birth Defect

How to pronounce polysomy?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say polysomy in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of polysomy in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of polysomy in Pythagorean Numerology is: 5

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=polysomy
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Polysomy
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Polysomy
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=polysomy