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Advanced Biology 13
| Question | Answer |
|---|---|
| Genetics | The scientific study of heredity and hereditary variation. |
| Genes | A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA. |
| Gametes | A haploid reproductive cell such as an egg or sperm. |
| Somatic Cell | Any cell in a multicellular organism except a sperm or egg or their precursors. |
| Locus | A specific place along the length of a chromosome where a given gene is located. |
| Sexual Reproduction | A type of reproduction in which two parents give rise to offspring that have unique combinations of genes inherited from both parents via the gametes. |
| Homologous Chromosomes | A pair of chromosomes of the same length, centromere position, and staining pattern that possess genes for the same characters at corresponding loci. |
| Diploid Cell | A cell containing two sets of chromosomes (2n), one set inherited from each parent. |
| Haploid Cell | A cell containing only one set of chromosomes (n). |
| Meiosis | A modified type of cell division in sexually reproducing organisms consisting of two rounds of cell division but only one round of DNA replication. Results in gametes. |
| Crossing Over | The reciprocal exchange of genetic material between nonsister chromatids during phrophase I of meiosis. |
| Chromatid | One half of a duplicated chromosome. |
| Autosome | A chromosome that is not directly involved in determining sex. |
| Fertilization | The union of haploid gametes to produce a diploid zygote. |