Differentiate between anaphase 1 and anaphase 2 of meiosis . Plzz help .!!
Answers
The main difference between anaphase I and anaphase II is that anaphase I occurs in a diploid cell and anaphase II occurs in a haploid cell.
• In anaphase I, centromeres of homologous chromosomes are attached to the spindle fibers so as the two spindle fibers are attached to the centromeres of each homologous chromosome whereas, in anaphase II, both spindle fibers are attached to the same chromosome.
• In the anaphase I, homologous chromosomes (bivalent) separate to opposite poles, retaining sister chromatids together, whereas anaphase II chromatids of a chromosome separate to opposite poles, splitting the centromere.
• In anaphase I, splitting of centromere do not occur whereas, in anaphase II, sister chromatids separate, splitting the centromere.
• At the end of anaphase I, one homologous chromosome will go to each daughter cell whereas, at the end of anaphase II, one sister chromatid will exist in each daughter cell.
• Anaphase II is similar to the mitosis anaphase whereas, anaphase I is not similar to the mitosis anaphase.
• In anaphase I, chromosomes are arranged around the equator of the spindle whereas, in anaphase II, plate of the chromatids arrangement is rotated by 90° relative to the arrangement in anaphase I.