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Pre-Ap Biology
| Question | Answer |
|---|---|
| bacteriophage | takes over a bacterium's genetic machinery and directs it to make more viruses |
| nucleotides | the small units that make up DNA |
| double helix | in which two strands of DNA wind around each other like a twisted ladder |
| base pairing rules | t=a c=g |
| replication | the process by which DNA is copied during the cell cycle |
| DNA polymerases | bonds the new nucleotides together |
| cell cycle | the regular pattern of growth, DNA duplication, and cell division that occurs in eukaryotic cells |
| mitosis | the division of the cell nucleus and its contents |
| cytokinesis | the process that divides the cell cytoplasm |
| chromosome | one long continuous thread of DNA that consists of numerous genes along with regulatory information |
| histones | each of your chromosomes is associated with a group of proteins |
| chromatin | loss combination of DNA and proteins |
| chromatid | one half of a two identical chromatids are called sister chromatids |
| centromere | a region of the condensed chromosome that looks pinched |
| somatic cell | also called body cells |
| gamete | sex cell- sperm and egg |
| homologous chromosomes | two chromosomes- one from father, one from mother |
| autosomes | chromosomes that contains genes for characteristics not directly related to the sex of an organism |
| sex chromosomes | directly control the development of sexual characteristics |
| sexual reproduction | involves the fusion of two gametes that results in offspring that are a genetic mixture of both parents |
| fertilization | actual fusion of an egg and a sperm cell |
| diploid | means a cell has two copies of each chromosomes |
| haploid | means that a cell has only on copy of each chromosome |
| meiosis | form of nuclear division that divides a diploid cell into haploid cells |
| gametogenesis | the production of gametes |
| sperm | male gamete |
| egg | female gamete |
| polar bodies | cells with little more than dna that |