ANSC 4395 exam 3 QUESTIONS AND ANSWERS GRADED A

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Simply-Inherited Traits Correct Answer: - traits affected by only a few genes - qualitative or categorical - rarely quantitative - typically not affected by the environment Polygenic Traits Correc... t Answer: - affected by many genes with no gene having an overriding influence - typically quantitative or continuous in expression - greatly influenced by the environment Threshold Traits Correct Answer: polygenic traits that have categorical phenotypes Which are more important? Correct Answer: - typically, polygenic traits - traits that determine productivity & profitability Test Matings Correct Answer: - matings designed to reveal the genotype of an individual for a small number of loci - simply-inherited traits 3 general types of test matings to determine if an individual is heterozygous: Correct Answer: 1) mating to recessives 2) mating to heterozygots 3) mating a sire to his daughters the method with the highest probability of detection: Correct Answer: mating to recessives Quantitative Correct Answer: - measured on a numerical scale - under the influence of many genes and the environment - express a continuous distribution from one extreme to the other - no discreet phenotypic classes like qualitative traits "normal" distribution or "bell curve" Correct Answer: - phenotypes will closely approximate a statistical distribution - allows us to use statistics to describe populations and their genetic makeup Statistic Correct Answer: estimate of a parameter Parameter Correct Answer: a value that describes a population Population Correct Answer: all the members of a group [Show More]

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