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Genetics
Genetics - most important terms
| Term | Definition |
|---|---|
| gene | a section of DNA that codes for a specific trait |
| meiosis | the cell division which takes place to form sex cells called gametes (sperm and egg cells) |
| fertilization | combination of two gametes (egg and sperm); results in a 2n zygote |
| gamete | haploid sex cell (egg or sperm) |
| asexual reproduction | reproduction using only mitosis; offspring are identical to parent |
| sexual reproduction | reproduction involving meiosis and fertilization; leads to greater genetic variation in offspring |
| alleles | forms of a gene |
| dominant | trait that is expressed over recessive |
| recessive | trait that is hidden when dominant is also present |
| genotype | type of genes; what alleles the organism has for a trait |
| phenotype | physical form; what trait shows in an organism |
| pedigree | family tree diagram showing inheritance of a trait |
| karyotype | visual representation of all the chromosome pairs from an individual organized by size |