DNA

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DNA
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Chromosomes are located inside what major
structure of the cell?
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The

• nucleus

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A short segment of a chromosome that governs the
expression of a trait is called a gene.
Gene
?
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Typically, there are a few thousand genes on one
chromosome. Currently, The Human Genome Project
is mapping out the location of all of the human
genes over 100,000 of them!
gene
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What makes one gene different than another?
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The sequence of DNA bases
Typically, one gene is hundreds of bases long!
One gene
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What 3 molecules compose a DNA nucleotide?
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A sugar, phosphate and a base
One nucleotide
A nucleotide is named after the base it has. The
illustration above is an adenine nucleotide!
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Name the sugar found in DNA
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Deoxyribose
D
D
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What are the 4 bases found in DNA?
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Adenine, thymine, guanine cytosine
Surprisingly, these are the only 4 bases in DNA
for every organism on the planet!
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What are the two molecules that make up either
side of a DNA ladder?
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Sugar (deoxyribose) and a phosphate group
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What specifically is a mutation?
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T
A change In the DNA code
A change in the DNA code
A
C
G
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Movie of cracking the code
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Nucleotide
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