GEN-3000 Chapter Notes - Chapter 3: Dihybrid Cross, Homologous Chromosome, Reciprocal Cross
Document Summary
Mendel determined that units of inheritance existed. Transmission genetics the field of genetics concerned with heredity and the mechanisms by which genes are transferred from parent to offspring. Trait any detectable phenotypic variation of a particular inherited character. Segregation the separation of maternal and paternal homologs of each homologous chromosome pair into gametes during meiosis. Terminology : phenotype the overt appearance of a genetically controlled trait, gene the fundamental physical unit of heredity, whose existence can be confirmed by allelic variants and which occupies a specific chromosomal locus. Testcross: a cross between an individual whose genotype at one or more loci may be unknown and an individual who is homozygous recessive for the gene or genes in question. Dihybrid cross: a two factor cross : a genetic cross involving two characters in which the parents possess different forms of each character.
