CHAPTER 12 GENETICS LESSON 3 DNA GENETICS Essential

CHAPTER 12: GENETICS

LESSON 3: DNA & GENETICS

? ? Essential Questions What is DNA? What is the role of RNA in protein production? How do changes in the sequence of DNA affect traits?

Vocabulary DNA Nucleotide Replication RNA Transcription Translation Mutation

The Structure of DNA (deoxyribonucleic acid): an organism’s genetic material A Complex Molecule

The Structure of DNA Four Nucleotides Shape DNA �A nucleotide is a molecule made of nitrogen base, a sugar and a phosphate group

The Structure of DNA How DNA Replicates � The process of copying a DNA molecule to make another DNA is called replication

Making Proteins Junk DNA The Role of RNA in Making Proteins � RNA (ribonucleic acid) is a type of nucleic acid that carries the code for making proteins from the nucleus to the cytoplasm � The process of making m. RNA (messenger RNA) from DNA is called transcription

Making Proteins Three Types of RNA: � m. RNA (messenger RNA) � t. RNA (transfer RNA) � r. RNA (ribosomal RNA) � The process of making a protein from RNA is called translation Translating the RNA Code

Mutations A change in the nucleotide sequence of a gene is called a mutation Types of Mutations Results of a Mutation

Classwork Page 445 #1, 2, 3, 4, 5, 6, 7, 8, and 10 Write down questions and answers Workbook page 384 – 387 and 393