It’s All About You, Baby!
Make a list of ten (10) characteristics of you (hair colour, sense of humour, etc).
Check mark the ones that you think were passed down to you by your parents
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Cell Division
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| A mother cell undergoes division to produce two daughter cells. The daughter cells will be genetically identical to the mother cell. This means that the daughter cells are clones and will have all the same characteristics as the mother cell. |
DNA
In the diagram above, each new daughter cell inherits a set of instructions that determines its characteristics & functions.
These instructions come in the form of DNA (deoxyribonucleic acid).
DNA is found in the nucleus of the cell. It is in the shape of a long, twisted ladder (double helix).
DNA coils & compacts into chromatin threads in order to pack into the tiny nucleus.
One of your
uncoiled DNA strands is 2 m long (and it fits into a nucleus with a diameter of 0.000
005 m). Woah!
When
a cell divides, the chromatin packs together even more tightly into chromosomes. These chromosomes are used to pass on hereditary information when a cell divides.
Let's learn some more about DNA by watching this video.
DNA Phone Home
Your
DNA replicates trillions of times over your lifetime. It’s
amazing that more mistakes don’t happen.
If you think of playing the "Telephone Game" as representing the duplication of DNA, you would have to pass along the contents of an entire shelf of books
to approximate the info in DNA. Double woah!
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Question of the Day #1: Why do you think DNA is packed together even more tightly into chromosomes when a cell divides? Send me your answer on Edsby.
