What mechanism is in place to ensure that these cells are the exact copies of the mother cell

1,2=Gene. A segment of a DNA molecule (a sequence of bases) that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism.

3=The primary protein components of chromatin are histones that compact the DNA. In general terms, there are three levels of chromatin organization: 1) DNA wraps around histone proteins forming nucleosomes; the "beads on a string" structure (euchromatin).

4=DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.

5=Where is DNA found? In organisms called eukaryotes, DNA is found inside a special area of the cell called the nucleus. Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. This packaged form of the DNA is called a chromosome.

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