BIOL 121 Chapter Notes - Chapter 13.4-13.5: Zygosity, Synapsis, Reciprocal Cross

• School: UBC
• Department: Biology
• Course: BIOL 121
• Professor: Greg Bole

Document Summary

Principle of segregation is possible due to the physical separation of alleles during anaphase of meiosis i. Independent assortment: when alleles for different genes are located on. Different non-homologous chromosomes, then they assort independently at meiosis i, shown below. Both of these are part of the chromosome theory of inheritance. Thomas hunt morgan tested the chromosome theory of inheritance on the fruit fly. He used a reciprocal cross on the flies. Wild type: the allele that encodes the phenotype most common in a particular natural population. (often a + ) Mutant: any other type of allele that isn"t a wild type. Unlike the pea cross that mendel did, the fly cross differed. Wild type red eyed flies were crossed with mutant white eyed flies. *when red eye female and white eye male mated, the result was all red eyes. When white eye female and red eye male mated, the result was females had red eyes and males had white eyes.