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Mrs. Nazario's class
Unit 4 Molecular Genetics 1
| Term | Definition |
|---|---|
| Anther | The upper portion of a stamen, which contains pollen grains |
| Cross-pollination | The transfer of pollen from the anther of one flower to the stigma of another |
| Egg cell | A female reproductive cell in a plant or animal |
| Embryo | The undeveloped stage of a plant or animal. Examples: a plant that has not germinated; a baby chick that has not hatched |
| Fertilization | The union of a male reproductive cell and a female reproductive cell to form a cell that will develop into a new individual |
| Filament | The stalk of a stamen |
| Genetics | The science of heredity |
| Germination | Starting to grow or develop; sprouting |
| Ovary | The enlarged lower part of a pistil and is the reproductive organ that produces egg cells. It encloses the ovules or young seeds |
| Ovule | Part of a plant that develops into a seed, found in ovary of a flower |
| Pistil | The entire female part of a flower |
| Pollen | A powdery grain on the stamen that contains a sperm cell |
| Receptacle | The stalk which holds a flower |
| Reproduction | The process by which cell produce new cells like themselves, or by which an organism produces offspring |
| Self-pollination | The transfer of pollen from the anther of a flower to the stigma of the same flower |
| Sepal | One of the leaflike parts which make up the calyx of a flower |
| Sperm cell | A male reproductive cell in a plant or animal |
| Stamen | The male part of the flower generally composed of an anther and filament |
| Stigma | The top of the pistil of a flower |
| Style | A part of the pistil of a flower that extends from the ovaries to the stigma |
| Chromosome | Rod-shaped parts of a cell that carry the genes (the hereditary material) |
| Gene | The unit of DNA which carries inherited traits |
| Meiosis | Cell division which takes place in the reproductive cells and which produce new cells with half the number of chromosomes |
| Mitosis | Cell division whereby new cells have the same number of chromosomes as the parent. Example: Cell division for repair |
| Nucleus | The part of a cell that contains the DNA molecule and controls cell activities |