Tetrad (meiosis)

For the microscopic chromosomal structures formed during the initial phases of meiosis, see tetrad (chromosomal formation).
Spores of Riccia sorocarpa still associated in tetrads following meiosis.

The tetrad is the four spores produced after meiosis of a yeast or other Ascomycota, Chlamydomonas or other alga, or a plant. After parent haploids mate, they produce diploids. Under appropriate environmental conditions, diploids sporulate and undergo meiosis. The meiotic products, spores, remain packaged in the parental cell body to produce the tetrad.