Tetras vs Tetrad - What's the difference?
tetras | tetrad |
A group of four things.
(chemistry) A tetravalent atom or radical.
(biology) Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
(biology) Group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.
("tetrad" on Wikipedia)