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DNA sequencing - Khan Academy
DNA sequencing involves three main steps: 1) using PCR to amplify DNA fragments, 2) introducing dideoxynucleotides that halt DNA strand elongation, and 3) employing a computer to analyze the fluorescent labels on the DNA fragments to determine the sequence.
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Learn about the discovery and properties of the genetic code and how to use the codon table in this Khan Academy article.
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Learn about beneficial, neutral, and harmful genetic mutations.
Evidence for evolution (article) | Khan Academy
Overview of the evidence supporting evolution and natural selection, including fossil records, biogeography, and molecular biology.
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The stages of translation in gene expression are explained, including initiation, elongation, and termination.
Introduction to nucleic acids and nucleotides - Khan Academy
DNA and RNA, composed of nucleotide building blocks, store hereditary information. These polymers have a backbone of alternating ribose and phosphate groups, with nitrogenous bases forming ladder rungs. The sequence of nucleotides encodes genetic information, making nucleic acids fundamental to life.
Unit 6: Molecular genetics - Khan Academy
DNA serves as the genetic material for all living organisms. Learn more about the structure and synthesis of this remarkable molecule, and how genes in your DNA provide instructions for building proteins.
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Learn about phylogenetic trees and their role in understanding evolutionary relationships on Khan Academy.