Fundamentals of Genetics, Evolution, and Human Anthropology
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Cellular and Genetic Foundations
- Cells: The fundamental unit of life.
- Prokaryotes: Lack a nucleus; typically single-celled organisms.
- Eukaryotes: Possess a nucleus and organelles; can be multi- or single-celled.
Genetics is the study of heredity. DNA structure was revealed in 1953, based on the work of Rosalind Franklin.
- DNA: A double helix structure composed of four bases (Adenine–Thymine, Cytosine–Guanine).
- DNA organizes sequentially into histones, forming chromatin, which condenses into chromosomes (humans have 23 pairs).
DNA Replication and Mutational Forces
- Replication Process: Involves initiation (using helicase), elongation (using polymerase), and termination.
- Mutations: Errors during replication are the only source of new genetic variation.