If there are 20 chromatids in a cell, then 10 centromeres are there.
Now that there are 20 chromatids, replication has taken place, thus they should be in identical pairs of two (sister chromatids). Ten centromeres would therefore exist.
What are chromatids?
- One half of a duplicated chromosome is called a chromatid.
- One DNA molecule makes up one chromosome prior to replication. The DNA molecule is duplicated during replication, and the two molecules are referred to as chromatids.
What is centromere?
- During cell division, the centromere connects a pair of sister chromatids.
- The sister chromatids are joined by this constrained area of the chromosome, giving the chromatids a short arm and a long arm.
- Spindle fibers connect to the centromere during mitosis via the kinetochore.
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