ANTH 1001 Lecture 6: Lecture 6: Genetics II-From Genotype to Phenotype
Document Summary
Rosalind franklin"s x-ray di raction photos provided clues to the structure of dna: thought of as incompetent and seen as an assistant. Franklin"s photo was stolen by one of her colleagues and given to james watson and francis crick. Biological role of genetic material: accurate replication, stable structure-so that mistakes are rare, capable of coding for diverse information, including proteins, capable of transmitting this information, to regulate development and normal cell functioning (linked to meiosis) The building blocks of dna: nucleotides: deoxyribonucleic acid (dna) is a nucleic acid. Resides in the nucleus of the cell. Made up of smaller molecules called nucleotides. Nucleotide bases : purines > adenine and guanine, pyrimidines > thymine and cytosine. Compromised of nucleotides : phosphate, sugar and nitrogenous base. Complementary base pairing : adenine = thymine, cytosine = guanine. Implications of dna structure: complementary polynucleotide chains (speci cty of base pairing) provides a mechanism by which the molecule can replicate itself.
