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BIOL 230 Study Guide - Midterm Guide: Lethal Allele, Punnett Square, Mendelian Inheritance

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tealhound285
20 Apr 2017
School
University of Victoria
Department
Biology
Course
BIOL 230
Professor
Choy Francisand Barbara Ehlting

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Document Summary

Chapter 3- mendelian genetics: mendel"s postulates help describe the basis for inheritance of phenotypic traits. Based on the analysis of numerous monohybrid crosses, he hypothesized that unit factors exist in pairs and exhibit a dominant/recessive relationship in determining the expression of traits. It has observable characteristics with two distinct forms: using seven visible features, each with two contrasting traits, and true-breeding strains, The results were the same either way: this is called a reciprocal cross, mendel proposed three postulates of inheritance, unit factors exist in pairs. Pedigree analysis reveals patterns of inheritance: pedigree conventions, parents are connected by a single horizontal line, and vertical lines lead to their offspring. Variable expressivity may be observed, or a percentage of organisms may not express the expected phenotype at all, the basis of the penetrance of a mutant allele. In addition, the phenotype can be modified by genetic background, temperature, and nutrition.

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Related Questions

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