Evolution Flashcards
Microevolution
Smaller scale, population level, changes in allele frequency in population over time via mutation, natural selection, genetic drift or gene flow
Macroevolution
Larger scale, above species level, changes during the history of life, zoom out
-Origin of mammals
Evidence of evolution
Fossils; show progression of evolution over time
Anatomy and embryology
Presence of structures in organism that share the same form also provide evidence for decent from common ancestor
- Over time evolution leads to changes in shapes and sizes but overall layout is reserved
- Homologous
Vestigial
Structures that are the remnants from evolution
Embryonic development
similarities in genome to those who are closely related
Biogeography
geographic distribution, see related species spread over different parts of the world if they evolved when continents connected
-unique species in isolation i.e. marsupials
Molecular biology
DNA sequences to reconstruct ancestry of organisms
Natural selection
Darwin, 1. variation 2. heredity 3. different reproductive health
Eumelanin
dark brown/black hair
Pheomelanin
light reddish brown
MC1R protein
Binds to melanocyte cell, stimulating hormone production which leads to eumelanin production
Melanocyte
specialized pigment producing cells