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Genetics #2
Incomplete dominance, codominance, genetic disorders, sex-linked traits
Term | Definition |
---|---|
Incomplete Dominance | when two organisms are crossed with two different phenotypes that produce offspring with a blended phenotype of the parents. (Red flower x white flower = pink flower) |
Name two examples of incomplete dominance | Four o'clock flowers and Andalusian fowl |
Codominance | when two organisms are crossed with two different phenotypes that produce offspring with both phenotypes present. (Red cow x white cow = red and white cow -roan cattle) |
Name four examples of codominance | Tabby cat, Roan cattle, Husky's eyes, Erminette chickens |
Genetic disorder | an abnormal condition that a person inherits through genes or chromosomes |
Mutation | changes in a person's DNA |
Cystic Fibrosis | a genetic disorder in which the body produces abnormally thick mucus in the lungs and intestines. |
Sickle-cell Anemia | a genetic disorder caused by abnormally shaped blood cells that make it difficult for the blood cells to carry oxygen |
Hemophilia | a genetic disorder in which the blood clots very slowly or not at all |
Down Syndrome | a genetic disorder that is due to an extra copy of chromosome 21 |
Pedigree | a diagram or chart that shows how traits are passed from one generation to the next in a family |
Meiosis | the double cell division to produce sex cells (23 chromosomes each) |