Biology

The correct answer is: A.Sister chromatids connected by a centromere

During metaphase, the chromosomes are in their most condensed form, and each chromosome consists of two sister chromatids. These sister chromatids are connected by a centromere. The chromatids are identical copies of the chromosome, formed after DNA replication in the S phase of the cell cycle.

Here's why the other options are incorrect:

B.Condensed chromatin: Chromatin condenses to form distinct chromosomes during prophase, but by metaphase, chromosomes are already fully ...