ch 14
About this set
Created by:
kfuntanilla on December 9, 2010
Subjects:
Description:
mendelian genetics, sex linkage
Log in to favorite or report as inappropriate.
Order by
14 terms
Terms | Definitions |
|---|---|
 trait | Any detectable variation in a genetic character |
| monohybrid cross | An organism that is heterozygous with respect to a single gene of interest. all the offspring from a cross between parents homozgous for different alleles are monohybrids. For example, parents of genotypes AA and aa produce a genotype of Aa. |
| dihybrid cross | an organism that is heterozygous with respect to two genes of interest. All the offspring from a cross between parents doubly homozygous for different alleles are dihybrids. For example, parents of genotypes AABB and aabb produce a dihybrid of genotype AaBb. |
| phenotype | The physical traits that appear in an individual as a result of its gentic make up. |
| genotype | an organism's genetic makeup, or allele combinations |
| law of segregation | Mendel's first law, stating that each allele in a pair separates into a different gamete during gamete formation. |
| law of independent assortment | Mendel's second law, stating that each allele pair segregates independently during gamete formation; applies when genes for two characteristics are located on different pairs of homologous chromosomes. |
| incomplete dominance | The situation in which the phenotype of heterozygotes is intermediate between the phenotypes of individuals homozygous for either allele. |
| polygenetic inheritance | additive effect on two or more genes on a single phenotypic characteristic |
| pleiotropy | The ability of a single gene to have multiple effects. |
| cystic fibrosis | a human genetic disorder caused by a recessive allele for a chloride channel protein; characterized by an excessive secretion of mucus and consquent vulnerability to infection; fatal if untreated (4% whites are carriers - most common lethal genetic disease) |
| sickle-cell disease | a human genetic disease caused by a recessive allele that results in the substitution of a single amino acid in a globin polypeptide that is a part of the hemoglobin protein; characterized by deformed red blood cells (due to protein aggregation) that can lead to numerous symptoms |
| achondroplasia | A form of human dwarfism caused by a single dominant allele; the homozygous condition is lethal |
| huntington disorder | A genetic disease caused by a dominant allele causing degeneration of the nervous system. Usually fatal 10-20 yrs after the onset of symptoms |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.