Hi Biology experts, I have a question regarding meiosis. I provided a diagram in my textbook for clarify if my wording is confusion.
OK, so the simplified diagram starts with a "a pair of homologous chromosomes". And as defined in the book, 1 homologous chromosome has 2 sister chromatids, so a pair of homologous chromosomes have 4 sister chromatids, correct?
All right, In Part 1, the pair of homologous chromosomes are duplicated, so that means there are 8 sister chromatids, total, correct?
In part 2, the homologous chromsomes are separated into two cells. Each cell has 4 sister chromatids, correct?
And then in Part 3, each gamete then has 2 sister chromatids?
If this is the case, my confusion is with the wording of the textbook in the diagram. Because the first image tells me there are 4 sister chromatids before part 1. And then in part one, the caption says sister chromatids for the duplicated homologous chromosomes, pointing to two of them, but shouldn't there be 4?
![Neutral Face](https://biology-forums.com/Smileys/default/1f610.png)
What am I missing?
![](http://i.imgur.com/dX2Axto.png)
I wasn't allow to post the image in the first post. Here it is