Terms : Hide Images
| 15166169 | Character | A heritable feature, such as a flower color. | |
| 15166170 | Trait | Each variant for a character, suc as purple or white color for flowers. | |
| 15166171 | True-Breeding | When plants self-pollinate, all their offspring are of the same variety. | |
| 15166172 | Hybridization | The mating, or crossing, of two true-breeding varieties. | |
| 15166173 | P Generation | The true-breeding parents. | |
| 15166174 | F1 Generation | The hybrid offspring. | |
| 15166175 | F2 Generation | The offspring of the self-polinating F1 Generation. | |
| 15166176 | Alleles | Alternative versions of a gene. | |
| 15166177 | Dominant Allele | The allele that is fully expressed in the organism's appearance. | |
| 15166178 | Recessive Allele | The allele with no noticeable effect on the organism's appearance. | |
| 15166179 | Law of Segregation | Mendel's first law, stating that allele pairs seperate during gamete formation, and then randomly re-form as pairs during the fusion of gametes at fertilzation. | |
| 15166180 | Punnett Square | A diagram used in the study of inheritance to show the results of random fertilization. | |
| 15166181 | Homozygous | An organism having a pair of identical alleles for a character. | |
| 15166182 | Heterozygous | An organism having two different alleles for a gene. | |
| 15166183 | Phenotype | An organism's traits | |
| 15166184 | Genotype | An organism's genetic makeup. | |
| 15166185 | Testcross | The breeding of a recessive homozygote with an organism of dominant phenotype but unknown genotype. | |
| 15166186 | Monohybrids | The breeding experiments of a single character. | |
| 15166187 | Dihybrids | The breeding experiements of two different characteristics. | |
| 15166188 | Law of Independent Assortment | The independent segregation of each pair of alleles during gamete formation. | |
| 15166189 | Incomplete Dominance | Where the F1 hybrids have an appearance somewhere in between the phenotypes of the two parental varieties. | |
| 15166190 | Complete Dominance | The phenotypes of the heterozygote and dominant homozygote are indistinguishable. | |
| 15166191 | Codominance | The two alleles affect the phenotype in seperate, distinguishable ways. | |
| 15166192 | Pleiotropy | The ability of a gene to affect an organism in many ways. | |
| 15166193 | Epistasis | A gene at one locus alters the phenotypic expression a gene at a second locus. | |
| 15166194 | Quantitative Characters | A heritable feature in a population that varies continuously as a result of environmental influences and the additive effect of two or more genes (polygenic inheritance). | |
| 15166195 | Polygenic Inheritance | An additive effect of two or more genes on a single phenotypic character. | |
| 15166196 | Norm of Reaction | The range of phenotypic possibilites for a single genotype, as influneced by the environment. | |
| 15166197 | Multifactorial | Many factors, both genetic and environmental, collectively influence phenotype. | |
| 15166198 | Pedigree | The information about a particular trait assembled into a family tree describing the interrelationships of parents and children and children across generations. | |
| 15166199 | Cystic Fibrosis | The most common lethal genetic disease in the United States. | |
| 15166200 | Tay-Sachs Disease | A lethal disorder inherited as a recessive allele. | |
| 15166201 | Sickle-Cell Disease | The most common inherited diesease among blacks. | |
| 15166202 | Huntington's Disease | A degenerative disease of the nervous system. | |
| 15166203 | Amniocentesis | A technique in a test that is able to determine if a developing fetus has Tay-Sachs disease. | |
| 15166204 | Chorionic Villus Sampling (CVS) | A technique where a physician inserts a narrow tube through the cervix into the uterus and suctions out a tiny sampling of fetal tissue from the placenta. |
