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Bio 120 Exam 3
| Question | Answer |
|---|---|
| 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 |