ELLA MARU STUDIO / SCIENCE PHOTO LIBRARY ELLA MARU STUDIO / SCIENCE PHOTO LIBRARY
Chromosomes, illustration. Before replication one chromosome consists of one DNA (deoxyribonucleic acid) double helix molecule. But after replication, which is required for cell division, each chromosome consists of two identical DNA molecules. These two newly copied DNA molecules form two chromatids. During cell division one chromatid is transferred to one daughter cell, and the second identical chromatid - to the other.
Model release not required. Property release not required.