ANT100Y1 Lecture Notes - Lecture 2: Messenger Rna, Transfer Rna, Genetic Drift
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ANT100Y1Y Outline for EVOL ANTH Lecture #2!
Genetic basis of inheritance and biological
evolution, population genetics, natural selection, &
Speciation, how evolution works on grand scale, &
The Modern Synthesis of Evolution
Genetics, Chromosomes, & DNA Molecules
DNA & Protein Production
Synthesis of single strand of ribonucleic acid (mRNA: messenger RNA) at unwound section of DNA
with one of DNA strands serving as template. Result: genetic information encoded in DNA transferred
to RNA. mRNA carries information into cytoplasm.
tRNA (transfer RNA) is information adapter molecule. Direct interface between amino-acid sequence
of protein & information in mRNA. Decodes information in mRNA. Acceptor stem where specific
amino acid is attached. Anticodon reads information in mRNA sequence by base pairing.
Genetics & Heredity
What Actually Happened in Mendel’s F1 x F1?
Population Genetics: Genetic Drift & Gene Flow
Any consistent difference in fitness among phenotypically different biological entities.
Deterministic process involving differential reproductive success. Acts only on existing variation.
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