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What is a quantitative trait locus (QTL)? Does a QTL contain one
gene or multiple genes? What technique is commonly used to identify QTLs?
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- For four bi-allelic loci of a quantitative trait, how many possible phenotypes and genotypes are there?How do scientists evaluate distributions of phenotypes to estimate the heritability of a complex trait—that is, the contributions of genes (as opposed to the environment) to the phenotypic differences observed in a particular population?Why are monozygotic twins who are reared apart so useful in the calculation of heritability?
- Which methods are essential during the analysis ofquantitative traits ?What is an LOD score and when can and has it been used?What is the difference between broad-sense heritability and narrow-sense heritability? Why is narrow-sense heritability such auseful concept in the field of agricultural genetics?
- Please use the following table to compare qualitative (Mendelian) traits and quantitative traits (complex traits) - choose from the following.What is a quantitative trait locus (QTL)? a. A portion of the genome that is a particular quantitative length b. A portion of the genome in which polymorphic markers correlate with a phenotype c. A region of the genome where qualitative traits associate with discrete phenotypes d. A region of the genome that does not follow Mendelian inheritance patternsWhich of the following can the results of a QTL tell you? a. Identify all of the causative genes underlying a trait. b. Identify the specific marker locus causes the phenotype you are tracking. c. Identification of regions of the genome that are associated with a trait. d. Identify haplotypes associated with specific traits of interest in other populations.