What is the genotype of a dominant individual if, when selfed, some of its offspring show the recessive phenotype?
A) Either DD or Dd B) dd C) DD D) Dd
D
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Let P = purple flowers and p = white, and T = tall plants and t = dwarf. Of the 16 possible gamete combinations in the dihybrid cross between 2 double heterozygotes, how many would produce the phenotype white, tall?
A. none B. 1 C. 3 D. 9 E. 16 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about dihybrid crosses? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Beadle and Tatum used nutritional mutants called ____ to study the relationship between genes and proteins in
Neurospora.
a. transposons b. chaperones c. polysomes d. auxotrophs e. wild types
Soluble antigens are detected in what type of test?
A. Cross-reactions B. Agglutination C. Precipitation D. Specificity E. Sensitivity
Which of the following is not a possible explanation for the origin of autoimmune diseases?
A. Forbidden clones B. Sequestered antigens C. Molecular mimicry D. The gut microbiome E. All the choices are currently being investigated as possible explanations.