What Is a Chromatid?

Chromatids are copies of chromosomes produced during replication. This name is often used to describe the chromosomes that preceded their division during subsequent cell divisions. From the early to the middle of mitosis ( in the late stage of mitosis, the centromere breaks, and no chromatids are present ), the chromosomes undergo longitudinal split along their long axis. The two chromosomes thus divided are each called a chromatid. The chromatids that started as a pair are not separated from each other, and gradually they have independent matrices, and each of them forms two dyed filaments. And chromatids often have interrelated spirals. The number of turns of these spirals gradually decreased before the middle period, and the centromere began to divide. From the middle stage to the late stage, a pair of chromatids are completely separated from each other, and move to opposite poles as daughter chromosomes. Meiotic bivalent chromosomes are produced by four chromatids (quad chromosomes).

Chromatid

Chromatids are copies of chromosomes produced during replication. This name is often used to describe subsequent

From

"X" has two chromatids, one chromosome, and two DNA molecules

When "X" is split into "|" and "|", there is no chromatid at this time ("|" cannot be called a chromatid, only in the form of "X" can there be two chromatids body)

The calculation of chromatids is based on the centromere point, one centromere point has two chromatids.

"|" Has no chromatid, one chromosome, one DNA molecule.