Definition of tetrad in English:

tetrad

noun ˈtɛtradˈtɛtræd

technical

A group or set of four.
〈技〉四元组，四个一组
a tetrad of distinct elements
Example sentencesExamples
- Sterile plants produce microspores aborted in tetrads, no visible pollen shed, and parthenocarpic pods bearing no seeds.
- Early in meiosis, each pair of homologs comes together to form a tetrad containing two pairs of sister chromatids.
- Two-thirds of the tetrads gave rise to four normally growing spores and one spore that formed a microcolony of 10 cells.
- In both strains, haploid phenotypes from tetrads yielding four viable spores may be used to measure the strength of crossover interference.
- Early microsporogenesis events are important to establish the shape of the tetrad, the polarity within the tetrad and consequently to determine the aperture pattern of the pollen grain.

Origin

Mid 17th century: from Greek tetras, tetrad- 'four, a group of four'.

Definition of tetrad in US English:

tetrad

nounˈtetradˈtɛtræd

technical

A group or set of four.
〈技〉四元组，四个一组
a tetrad of distinct elements
Example sentencesExamples
- Two-thirds of the tetrads gave rise to four normally growing spores and one spore that formed a microcolony of 10 cells.
- Early microsporogenesis events are important to establish the shape of the tetrad, the polarity within the tetrad and consequently to determine the aperture pattern of the pollen grain.
- In both strains, haploid phenotypes from tetrads yielding four viable spores may be used to measure the strength of crossover interference.
- Early in meiosis, each pair of homologs comes together to form a tetrad containing two pairs of sister chromatids.
- Sterile plants produce microspores aborted in tetrads, no visible pollen shed, and parthenocarpic pods bearing no seeds.

Origin

Mid 17th century: from Greek tetras, tetrad- ‘four, a group of four’.

词汇	tetrad
释义	Definition of tetrad in English: tetrad noun ˈtɛtradˈtɛtræd technical A group or set of four. 〈技〉四元组，四个一组 a tetrad of distinct elements Example sentencesExamples Sterile plants produce microspores aborted in tetrads, no visible pollen shed, and parthenocarpic pods bearing no seeds. Early in meiosis, each pair of homologs comes together to form a tetrad containing two pairs of sister chromatids. Two-thirds of the tetrads gave rise to four normally growing spores and one spore that formed a microcolony of 10 cells. In both strains, haploid phenotypes from tetrads yielding four viable spores may be used to measure the strength of crossover interference. Early microsporogenesis events are important to establish the shape of the tetrad, the polarity within the tetrad and consequently to determine the aperture pattern of the pollen grain. Origin Mid 17th century: from Greek tetras, tetrad- 'four, a group of four'. Definition of tetrad in US English: tetrad nounˈtetradˈtɛtræd technical A group or set of four. 〈技〉四元组，四个一组 a tetrad of distinct elements Example sentencesExamples Two-thirds of the tetrads gave rise to four normally growing spores and one spore that formed a microcolony of 10 cells. Early microsporogenesis events are important to establish the shape of the tetrad, the polarity within the tetrad and consequently to determine the aperture pattern of the pollen grain. In both strains, haploid phenotypes from tetrads yielding four viable spores may be used to measure the strength of crossover interference. Early in meiosis, each pair of homologs comes together to form a tetrad containing two pairs of sister chromatids. Sterile plants produce microspores aborted in tetrads, no visible pollen shed, and parthenocarpic pods bearing no seeds. Origin Mid 17th century: from Greek tetras, tetrad- ‘four, a group of four’.
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