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Chp. 9 Inheritance
Campbell Essential Biology, 5th edition. Patterns of inheritance
| Question | Answer |
|---|---|
| Character | Heritable feature |
| Trait | Each variant of a character |
| Hybrid | Offspring of 2 different purebred varieties |
| P Generation | Parent plants |
| Monohybrid Cross | Parental plants that differ in only one character |
| Alleles | Alternative versions of a gene |
| Homozygous | 2 identical alleles for a gene |
| Heterozygous | 2 different alleles for a gene |
| Dominant Allele | One determines organism's appearance |
| Recessive Allele | No noticeabe effect on organism's appearance if paired with a dominant allele |
| Phenotype | Organism's physical appearance |
| Genotype | Genetic makeup |
| Mendel's Law of Segegation | Pairs of alleles seperate during gamete formation; fusion of gametes at fertilization creates allele pairs |
| Locus | Specific location of gene along chromosome |
| Dihybrid Cross | Mating of parental varieties with 2 differing characters |
| Mendel's Law of Independant Assortment | Inheritance of one characteristic has no effect on the inheritance of another |
| Testcross | Mating between a heterozygous of unknown genotype and a homozygous recessive |
| Wild-Type Traits | Most commonly seen traits in nature |
| Incomplete Dominance | Appearance falls in the middle of the 2 parents |
| Codominant | Both alleles are expressed |
| Pleiotropy | One gene influences several characters |
| Polygenic Inheritance | Several genes influence one character |