Page 14 - Science E-Book Prep.3 2024-2025 1st term_Neat unit 3,4

Science Department
Prep.3

- Which part of the cell is responsible for cell division?

- The cell nucleus contains the genetic material of living organism.
- This genetic material consists of a number of chromosomes.
- Chromosomes have the main role in cell division.

General structure of the chromosome:

Consists of:
-Two connected threads at the centromere
point.
-Each thread is called a chromatid.

The chromosome chemically consists of:

- Nuclear acid called D.N.A and protein.

- DNA carries the genetic traits of the
organisms.

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First Term