BIOL 1090 Lecture Notes - Lecture 4: Zygosity, Mendelian Inheritance, Inbreeding
2 Mar 2018
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Document Summary
Monohybird crosses: mendel"s princinple of dominance and segregation. Mendel"s peas were highly in-bred: genetically similar for given traits. In peas, the structure of the flower enforces self-fertilization between the plants own male and female gametes. Therefore, the plants are said to be true-breeding Mendel"s experiments were carefully designed so that he could study the transmission of one trait at a time. Parental generation (p or p0): the parents in a genetic cross. Each trait was controlled by a heritable factor that came in one or two forms. Dominant and recessive forms of the gene are alleles. In a heterozygote, one allele may conceal the presence of another. In the dd heterozygote the dominate d allele conceals the presence of the recessive d allele. Ina heterozygote two different alleles segregate from each other during the formation of gametes. In the dd hetrozygote gamete formation involves segregation of the. D and d alleles (dihybird crosses) the principle of independent assortment.
