BIOL 201 Study Guide - Midterm Guide: Cell Membrane, Red Tide, Osmosis
Document Summary
Speciation mechanisms that lead to reproductive isolation of populations. Sexual reproduction and life cycles; evolution by sexual selection. Introduction to the algae: light energy available to an aquatic organism, some generalities on the ecology of algae. Sources of genetic variation that provide the bases for evolution by natural selection. Sequence movement within and between chromosomes (plasmids, transposons): -> abwxyzde, abzyxwde, abcdabce Deletion or duplication of whole chromosomes -> abcde abcde. All the same species that can all interbreed large variation (diff types of. Horizontal (mainly) bc plastids (movement of whole pieces of genome into mutations) plastids) N = haploid (contains one member of each homologous pair of chromosomes) 2n = diploid (contains both members of each homologous pair of chromosomes) Sexual recombination provides:enhanced genetic diversity despite longer generation times (c. f. prokaryotes) Each reproduction event -> enhanced genetic diversity among populations within a species. Dominance/recessive alleles in zygotealternating gamete/spore (haploid) and zygote (diploid) life stages potential for polyploidy.
