Ploidy indicates the number of copies of the basic number of chromosomes. The number of basic sets of chromosomes in an organism is called the monoploid number (x). The ploidy of cells can vary within an organism.
Ploidy is the number of homologous sets of chromosomes in a biological cell. The ploidy of cells can vary within an organism.
ploidy
the number of chromosome sets per cell, for example, monoploidy (haploid), diploid, triploidy, etc.
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
ploidy
The number of sets of chromosomes within a cell or organism. Each set is designated n so one set is n is haploid, two sets is 2n is diploid, three sets is 3n is triploid, four sets is 4n is tetraploid, etc.
Polyploidy in plants
Polyploidy is very common in plants, especially in angiosperms. From 30% to 70% of today's angiosperms are thought to be polyploid. Species of coffee plant with 22, 44, 66, and 88 chromosomes are known.
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Definition of aneuploidy :
The condition of a cell or of an organism that has additions or deletions of a small number of whole chromosomes from the expected balanced diploid number of chromosomes.
Ploidy: Number of sets of chromosomes in a cell
Haploid (n)-- one set chromosomes
Diploid (2n)-- two sets chromosomes
Most plant and animal adults are diploid (2n)
Eggs and sperm are haploid (n) ...
Aneuploidy (ANN-yoo-PLOY-dee) The condition of having an abnormal number of chromosomes. See Down syndrome.
Antibody A protein produced by the immune system in response to a foreign substance such as a virus or bacterium.
Aneuploidy having an abnormal number of chromosomes
(aneu = without; ploid = set of chromosomes) ...
aneuploidy Variation in chromosome number involving one or a small number of chromosomes; commonly involves the gain or loss of a single chromosome.
aneuploidy
(an-yoo-ploy-dee)
A chromosomal aberration in which certain chromosomes are present in extra copies or are deficient in number.
angiosperm ...
polyploidy Abnormal variation in the number of chromosome sets. The condition when a cell or organism has more than the customary two sets of chromosomes.
Aneuploidy
Cells that have extra chromosomes or chromosomes missing are aneuploid. Two types of aneuploidy are discussed below.
Aneuploidy
A chromosome number that is not an exact multiple of the haploid number. Usually refers to an absence (monosomy) or an extra copy (trisomy) of a single chromosome.
Related Terms:
Chromosome ...
Aneuploidy involving the X and Y chromosomes is more common in humans since the results are less devastating than autosomal aneuploidies.
aneuploidy Loss or gain of a chromosome, cells of the organism have one fewer than normal chromosome number, or one extra chromosome, for example, trisomy 21 (Down syndrome).
Amphidiploidy
An allopolyploidy; a polyploid genotype formed from the union of two separate chromosome sets and their subsequent doubling. An organism produced by hybridization of two species followed by chromosome doubling.
Aneuploidy -- state of having variant chromosome number (too many or too few). (i.e. Down syndrome, Turner syndrome).
Triploidy The presence of a full extra set of chromosomes. Often lethal.
Trisomy 3 copies of a particular chromosome (normally we have only 2.)
tRNA See transfer RNA.
Speciation through hybridization and/or polyploidy has long been considered much less important in animals than in plants [[[refs.]]]. A number of reviews suggest that this view may be mistaken.
A polyploid formed from the doubling of a single genome. Polyploidy in which all the chromosomes come from the same species.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Offspring produced from parents of two different species
Chromosomal number doubles / polyploidy
New species is reproductively isolated by a postmating mechanisms
Ecosystem ...
This allows the simultaneous manipulation of ploidy of multiple genes and will be critical for understanding complex multigene disorders.
 See also: Chromosome, Chromosomes, Organ, Human, Cell
  
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