Question

which of the following phases are characterized by splitting of centromeres
1. mitotic anaphase and anaphase 1
2. meiotic anaphase 1 and anaphase 2
3. mitotic anaphase and anaphase 2
4. mitotic metaphase and metaphase 2​

Answer 1

Answer:

3. mitotic anaphase and anaphase 2

Explanation:

• in mitotic anaphase the spindle fibre from each pole attaches to the kinetochore of chromosome centromere aligned at equator and splitting them apart to the poles.
• in anaphase 1 of meiosis the bivalent chromosome does not separate but during anaphase 2 of meiosis the bivalents separate into chromatins splitting the centromere which moves to each poles.

Answer 2

Splitting of centromeres takes place in the mitotic anaphase and anaphase 2. (Option 3)

• The highlight of the anaphase is the splitting of the centromeres.
• A centromere is a chromosome's DNA sequence.
• They link the sister chromatid pairs.
• This occurs during the mitotic phase of cell division.
• During this phase, when the cells divide, chromosomes in them also get divided.
• As a result, the centromere that is present in the middle of the chromosome is also forced to split.
• In anaphase 1, the centromere is intact because chromosomes only move to a side of the cell.
• But in anaphase 2, the sister chromatids split, causing the centromere to split.