AP BIOLOGY

Detailed explanation-1: -centromere, structure in a chromosome that holds together the two chromatids (the daughter strands of a replicated chromosome). The centromere is the point of attachment of the kinetochore, a structure to which the microtubules of the mitotic spindle become anchored.

Detailed explanation-2: -The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere.

Detailed explanation-3: -The two identical chromosomes that result from DNA replication are referred to as sister chromatids. Sister chromatids are held together by proteins at a region of the chromosome called the centromere. Chromosomes undergo additional compaction at the beginning of mitosis.

Detailed explanation-4: -That is called an “acrocentric chromosome.” What you can’t see is the very special kind of DNA that makes up the centromere. It is a specific kind of repetitive DNA, called “alpha satellite.” The alpha satellite DNA is where the proteins that the centromere needs to attach to the spindle fibers come together.