The Vocabulary of DNAGenetics—The study of

genes & ________________-- inherited

characteristic determined by the presence and expression of dominant and/or recessive alleles.

________-- a segment of DNA that codes for a protein, which in turn codes for a trait (skin tone, eye color, etc.)

DNA & RNA

When Watson, Crick and Wilkins got their Nobel prize awards in 1962, Rosalind Franklin was cheated of deserved recognition in part by her early death from cancer in 1958.

Rosalind Franklin and Maurice Wilkins took DNA X-ray photos that were essential to the discovery of the __________________of DNA by James Watson and Francis Crick in 1953.

Why is the Study of DNA Important?

It’s essential to all life on earthMedical Benefits—disease detection,

treatment, preventionDevelopment of ________Forensics

NucleotidesConsists of…

___________Carbon sugar (deoxyribose)___________ base

Types of Nitrogenous BasesA = adenineT = thymineC = cytosineG = guanine

DNA StrandEach nucleotide bonds

to the next one to form a strand.The two strands twist

around a ________________to form a double helix.

Sides of the ladder alternate phosphate and sugar (___________________)

Rungs are held together by _____________ bonds

Base Pair RuleAdenine can bond

only with ThymineA-T or T-A (2 H bonds)

Cytosine can bond only with GuanineC-G or G-C (3 H bonds)

This is called the BASE PAIR RULE or ______________ Rule

RNARibonucleic Acid

Consists only of one strand of nucleotides

Has____________(a 5C sugar) NOT deoxyribose

Has uracil (U) as a nitrogenous base NOT _________