Chromosome Definition
DNA in a Package


The chromosome definition: It is a package of DNA prepared right before cell division.  When a cell is ready for cell division, it would coil up its DNA and neatly pack the DNA into chromosomes.  By packing DNA into chromosomes, the cell can avoid damaging or losing any DNA during the cell division.  This is very similar to you packing up your valuables into boxes right before remodeling your house–you would hate to damage or lose that diamond jewelry, right? 🙂

20170606 Chromosome Definition p1
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20170606 Chromosome Definition p2
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It Is the Same Principle:

20170606 Chromosome DNA imp 2

Cells are VERY NEAT  packers when they pack DNA into chromosomes.  Each species always packs a fixed numbers of chromosomes.  In addition, every piece of chromosome has rules to decide “which DNA goes where”!
(SEE COMIC BELOW) 

20170606 Chromosome Definition p3
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Next Generation Science Standards:

HS-LS1-1. Construct an explanation based on evidence for how the structure of DNA determines the structure of proteins which carry out the essential functions of life through systems of specialized cells.

HS-LS1-2. Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.

What Science Does this Comic Teach?

Unit: Genetics

⇒Chapter: Chromosome

⇒Topic: Chromosome Definition

Additional Information

DNA

DNA stands for deoxyribonucleic acid, and it is the molecule that makes up genetic materials.

Cell Division

It is the process in which a cell divides itself into 2 cells.  There are 2 types of cell division: mitosis and meiosis.

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