For those wanting to know what the new Snapchat emoji symbols mean, there is several different things that they repersent and these emojis have replaced the âBest Friendsâ feature with Friend Emojis smilies.
(plural tetrads) 1  A group of four things. ( 2 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.
Best Answer: E, both B and D. Synapsis is chromosomal crossover which leads to variation doesn't occur in mitosis. tetrads are paired chromosomes, which have two chromosomes and four chromatids, with one chromosome coming from each parent.