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Genetics vocab
Words needed to fully understand basics of genetics
| Term | Definition |
|---|---|
| Heredity | passing of traits from parents to offspring |
| Dominant | strong gene, represented with capital letter (H) |
| Recessive | weak gene, represented with lower case letter (h) |
| Genetics | study of inheritance, started by Gregor Mendel, who studied pea plants |
| Heterozygous | different gene combination (Rr) |
| Homozygous | same gene combo (RR or rr) |
| Genotype | gene possibilities inside nucleus (letter combinations) |
| Phenotype | what trait shows on outside (% and word of trait) |
| Punnett Square | diagram to show inherited trait possibilities |
| Genes | sentence of genetic code, on chromosomes, determines traits |
| Zygotes | 2 gametes join in fertilization to make organism--1 cell |
| Gamete | sex cell |
| Polygenic/Multigenic Genes | more than one gene controls trait |
| Chromosomes | made of many genes (humans have 23 pairs, or 46 total) |
| Meiosis | gamete making process, 1 cell becoming 4, steps are coil up, copy/double, split in 2, split into 4, then 2 gametes join in fertilization |
| Kayotyping | chromosomes sucked out of nucleus, stained, lined up, checked for disorders |
| DNA | deoxyribonucleic acid, your genetic code, contains chemicals A (adenine), T (thiamine), C (cytosine), and G (guanine); 3 letter words of amino acids; the messenger carrier is RNA |
| Double Helix | twisted ladder shape of DNA |
| Protein | the chemical DNA code tells the cell to make this |
| Replication | process of DNA unzips, grabs match (A grabs T, C grabs G) from cytoplasm, new matching DNA formed |
| Mutation | change/mistake in DNA |
| Genome | library of human chromosomes, maps out what genes and where located (traits) |
| DNA Fingerprinting | crime solving technique, analyzes DNA, unique to you |
| Cloning | exact copy of organism, sucks out DNA from nucleus, puts in another cell |