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Found in pairs
Citation preview
1.2 Genes: Answers and Questions
Page 16-28
Chromosomes
• Found in the nucleus• Thread-like structure
• Found in pairs
• DNA is made up of genes• Genes code for genetic traits
DNA
• 4 types of building blocks: C, G, A, T
• Genes control what proteins you produce
(lifestyle too)
DNA screening
PKU
• Baby blood is tested for phenylalanine, a protein.
• PKU• Down Syndrome• Huntington disease• Breast cancer• Cystic fibrosis• Spina bifida
Ethics
Big cost of drug research… can you charge a lot for needed drugs?
Transgenic GMO
• Genetically modified organisms
Cloning
• Creating identical copies of an organism
Cloning
Carrot
Cloning
• sheep
DNA mutation
Mutations
mutagens
A substance or factor that causes changes in the DNA:• U.V. light• Pollution• Radiation• Chemicals
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