Homewood Biology9
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15 terms
Terms | Definitions |
|---|---|
 Meiosis | A form of cell division that halves the number of chromosomes when forming specialized reproductive cells,such as gametes or spores. |
| Crossing-over | Occurs when portions of a chromatid on one homologous chromosome are broken and exchanged with the corresponding chromatid portions of the other homologous chromosome. |
| Independent assortment | A random distribution of homologous chromosomes during meiosis. |
| Spermatogenesis | The process by which sperm is produced in male animals. |
| Sperm | The male gamete. |
| Oogenesis | The process by which gametes are produced in female animals. |
| Ovum | A female egg cell |
| Asexual reproduction | A single parent passes copies of all of its genes to each of its offspring. |
| Clone | An organism that is genetically identical to its parent. |
| Sexual reproduction | Two parents each form reproductive cells that have one half the number of chromosomes. |
| Life cycle | The entire span in the life of an organism from one generation tho the next. |
| Fertilization | Gametes fused in a process. |
| Sporophyte | The diploid phase in the life cycle that produces spores. |
| Spore | A haploid reproductive cell produced by meiosis that is capable of developing into an adult without fusing with another cell. |
| Gametophyte | The haploid phase that produces gametes by mitosis. |
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