Presentation on theme: "Chapter 6: Genes and DNA Standard S7L3: Recognize how biological traits are passed on to successive generations."— Presentation transcript:
1 Chapter 6: Genes and DNAStandard S7L3: Recognize how biological traits are passed on to successive generations
2 EQ: What is the basic structure of DNA? Deoxyribonucleic acid, genetic materialChromosomes are made of protein and DNAGives instructions fro building and maintaining cellsCopied each time a cell divides to make identical genes
3 Subunits of DNA Nucleotide 4 Bases of Nucleotide Made of a sugar, a phosphate and a baseAre identical except for the baseAdenine (A)Thymine (T)Guanine (G)Cystosine (C)
4 Charguff’s Rules about DNA’s Bases Shape of DNAThe amount of adenine equals thymineThe amount of guanine equals cytosineTwisted ladderRungs of the ladder are made of pairs of basesAdenine with thymineGuanine with cytosine
5 EQ: How are copies of DNA made? ReplicationMakes copiesThe pairing of bases allows for replication of DNA.Pairs of bases are complimentary to each other.So both sides of the ladder are complimentary.
6 During replicationDNA molecule splits down the middle.The bases on each side of the molecule are used as a pattern for a new strand.Complimentary nucleotides are added to the original sides of DNA ladder.Two DNA molecules form.Half is new DNA, half is old