tetraploid

American  

[te-truh-ploid] / ˈtɛ trəˌplɔɪd /

adjective

Biology.

1. having a chromosome number that is four times the basic or haploid number.

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noun

1. a tetraploid cell or organism.

tetraploid British  

/ ˈtɛtrəˌplɔɪd /

adjective

1. having four times the haploid number of chromosomes in the nucleus

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noun

1. a tetraploid organism, nucleus, or cell

Other Word Forms

• tetraploidy noun

Etymology

Origin of tetraploid

First recorded in 1925–30; tetra- + -ploid

Example Sentences

However, sometimes the number of chromosome sets doubles from one generation to the next: one diploid organism suddenly becomes a tetraploid -- i.e. it has four sets of chromosomes.

From Science Daily • Apr. 16, 2024

After the whole genome duplication, the mutated plant and its tetraploid descendants had two copies of its genome in the nucleus of its cells.

From Slate • Jun. 11, 2014

As a result, it is impossible to split the assembled genome of into haploid sets: the apparent ploidy level of is scale-dependent, with a tetraploid structure at gene scale versus chromosome-scale haploidy.

From Nature • Aug. 21, 2013

Today, farmers plant both tetraploid 28-chromosome durum wheat and hexaploid 42-chromosome bread wheat.

From Scientific American • May 19, 2013

The normal number in the gamete, 7, is considered the simple or haploid number, and therefore the number 28 is called tetraploid.

From Hormones and Heredity by Cunningham, J. T.