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Bio 120 Exam 3

Chapter 12- Cell Cycle ...
Somatic Cell Non-Sex cell.
How many Chromosomes are in a Human Somatic Cell? 46
Genome All the DNA containing the information to produce and maintain an organism.
Chromosomes One DNA molecule and associated protein molecules.
Gene A discrete unit of heredity information consisting of specific nucleotide sequences.
Trait Characteristic Ex. Eye Color
Allele Variation of a gene Ex. Brown, Blue, green, hazel...
Cell Cycle has 2 phases. Interphase and Mitotic Phase
Mitotic Phase Mitosis (Division of genetic materia)l & Cytokinesis (Division of cytoplasm)
Mitosis Division of genetic material
Cytokinesis Division of cytoplasm
Note for Cell cycle During all phases of interphase growth of the cell and replicate of organelles. ONLY during the S-synthesis phase does DNA replicate.
Diploid cells Cells that have pairs of Chromosomes.
Homologous Chromosomes Are the same length, have their centromere at the same position, and code for the same traits.
How many pairs of (Homologous) chromosomes are in a human somatic cell? 23
Note for DNA Replication When DNA replicates a single double-stranded chromosome becomes a single chromosome composed of two double stranded sister Chromatids.
What is the purpose of Mitosis? 1. To reproduce (Asexually) 2. For growth of an organism 3. To repair/Replace damaged cells/tissues
Created by: foreverbee15