Bio 181 Exam ch. 12, 13, 14 questions well answered

Bio 181 Exam ch. 12, 13, 14what is binary fusion? - correct answer The chromosome replicates (beginning at the origin of replication) and two daughter chromosomes actively move apart In what kind of organisms does binary fission occur? - correct answer Prokaryotic cells and unicellular protozoa (only some, not all) What are the roles of mitosis? - correct answer Growth, reprodution, and Damage repair In which cells mitosis occurs? - correct answer root and shoot apices of plants, In eukaryotes, Somatic cells (vegetative cells) What are the phases in mitosis? - correct answer prophase, prometaphase, metaphase, anaphase, telophase What happens during prophase of mitosis? - correct answer nuclear envelope degenerates, nucleus disappears, chromosomes become condensed What happens during prometaphase of mitosis? - correct answer DNA condenses, nuclear envelope degenerates, spindle fibers tighter, polar fibers extend from the poles to true equatorial plate What happens during metaphase of mitosis? - correct answer chromosomes have moved to the center of the cell, chromosomes align in single file on the metaphase plate What happens during anaphase of mitosis? - correct answer DNA is duplicated allowing chromosomes to separate, chromatids separate, migrate to separate poles (own daughter chromosomes), fibers shorten