Differentiate between Anaphase I and Anaphase II

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Solution

Anaphase I is one of the most important phases in the meiotic division of cells. During anaphase I, spindle fibers shrink, seperating the chromosomes of a homologous pair. Separated chromosomes move towards opposite poles.
Anaphase II happens in second meiotic division. During anaphase II spindle fibres shrink and pulling the chromatids. Chromatids moves apart to the opposite poles.

Anaphase I
Anaphase II
1. Anaphase I takes place during Meiosis I 1. Anaphase II takes place during Meiosis II.
2. No splitting up of centromere. 2. Centromere of chromosome splits into two.
3. Chromosome of homologous pair separate and move towards poles. 3. Chromatids of a chromosome separate and move towards poles.

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Question 2

At which stage of meiosis does the genetic constitution of gametes is finally decided
(a) Metaphase-I
(b) Anaphase-II
(c) Metaphase-II
(d) Anaphase-I

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Anaphase I	Anaphase II
1. Anaphase I takes place during Meiosis I	1. Anaphase II takes place during Meiosis II.
2. No splitting up of centromere.	2. Centromere of chromosome splits into two.
3. Chromosome of homologous pair separate and move towards poles.	3. Chromatids of a chromosome separate and move towards poles.