Question

In meiosis 1 what happens during anaphase?

Answer 1

In anaphase I of meiosis, homologous chromosomes are separated and pulled to opposite cell poles, with sister chromatids remaining attached, which sets the stage for genetic diversity in the offspring.

Step-by-step explanation:

During anaphase I of meiosis, the homologous chromosomes are pulled apart by spindle fibers. The chiasmata, which are the points where chromosomes crossover, are broken as the microtubules shorten. This results in homologous chromosomes moving toward opposite poles of the cell, while the sister chromatids remain connected at the centromere. This process ensures that each daughter cell will receive one chromosome from each homologous pair.

It is crucial to note that anaphase I is distinct from anaphase II, which occurs in meiosis II, where the sister chromatids are separated and pulled to the opposite poles of the cells.

Answer 2

Anaphase I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle. Notice that in anaphase I the sister chromatids remain attached at their centromeres and move together toward the poles.