AP BIOLOGY

Detailed explanation-1: -A sister chromatid refers to the identical copies (chromatids) formed by the DNA replication of a chromosome, with both copies joined together by a common centromere. In other words, a sister chromatid may also be said to be ‘one-half’ of the duplicated chromosome. A pair of sister chromatids is called a dyad.

Detailed explanation-2: -A chromosome is made up of two Identical Sister Chromatids. And each sister chromatid is joined at the centromere. A copy of each chromosome is inherited from a male parent and a female parent and this explains the character traits possessed by their offspring (such as facial features reminiscent of the parents).

Detailed explanation-3: -The duplicated chromosome becomes a double-stranded chromosome and each strand is called a chromatid. Paired chromatids are held together at a region of the chromosome called the centromere. The paired chromatids or sister chromatids eventually separate and become known as daughter chromosomes.

Detailed explanation-4: -After DNA is replicated each chromosome consists of paired sister chromatids held together by cohesin.

Detailed explanation-5: -Definition. Following DNA replication, as part of cell division, each chromosome consists of two full length DNA molecules joined at the centromere. These two DNA molecules are sister chromatids.