In the analysis of quantitative traits, positions on chromosomes called quantitative trait loci (QTLs) are often discussed. In the same context, restriction fragment length polymorphisms (RFLPs) are also discussed. What is the relationship between QTLs
and RFLPs?
What will be an ideal response?
In many organisms, traditional genetic markers are not available for the mapping of regions of chromosomes containing genes responsible for determining quantitative trait loci (QTLs). DNA polymorphisms generate molecular markers RFLPs, which can serve as reference points in mapping QTLs.
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The overall purpose of DGGE is to
A) separate genomes that are less than 95% similar. B) measure activity of cells that use DGGE as an energy source. C) detect cells that utilize a specific radiolabeled substrate. D) separate genes of the same length that differ in their denaturing profile due to sequence variation.
Answer the following statements true (T) or false (F)
1. The presence of salt helps prevent oceans from freezing. 2. A dehydration reaction that builds larger molecules from smaller units requires the addition of a water molecule. 3. The hydroxyl (OH-) concentration of a solution with a pH of 8 would be 10-6 molar. 4. Most enzymes or bioactive molecules work effectively within a broad range of pH. 5. Buffers minimize fluctuations in the pH of a solution.
__________ species of many plants (and a few
animals) originated by chromosome doublings and hybridizations. Fill in the blank(s) with the appropriate word(s).
Which of the following responses is NOT controlled
by plant hormones? a. the growth form of the plant (apical dominance) b. the beginning and ending of dormancy c. the bending of an oat coleoptile toward light d. the production of glucose by the chloroplast e. the formation of abscission zones