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TLS Online TPP Program

#Question id: 7297

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?

#Unit 5. Developmental Biology
  1. The key resposnsibility of homeotic genes in both is patterning of dorsal-ventral asymmetry.
  2. In both organisms, one homeotic gene is expressed at the two ends, a second expressed in to domains more central to that of the first and a third expressed more centrally, thus contributing unambiguous identities to all regions of the organism.
  3. In both organisms, homeotic genes interact, so that it is often the combination of genes present that is critical in specifying structure in adult.

  4. The ABC model of Arabidopsis is essentially identical to the Drosophila model for homeotic gene function, in that the Drosophila version of the A gene is abdominal-A, the Drosophila version of the B gene is Abdominal-B, and the Drosophila version of the C gene is Ultrabithorax.

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TLS Online TPP Program

#Question id: 23859

#Unit 13. Methods in Biology

Which uses reverse transcriptase to make cDNA followed by amplification?
TLS Online TPP Program

#Question id: 23860

#Unit 13. Methods in Biology

RNAi methodology uses double-stranded pieces of RNA to trigger a breakdown or blocking of mRNA. For which of the following might it more possibly be useful?
TLS Online TPP Program

#Question id: 23861

#Unit 13. Methods in Biology

Which of the following techniques used to analyze gene function depends on the specificity of DNA base complementarity?
TLS Online TPP Program

#Question id: 23862

#Unit 13. Methods in Biology

Which of the following is most closely identical to the formation of twins?
TLS Online TPP Program

#Question id: 23863

#Unit 13. Methods in Biology

In 1997, Dolly the sheep was cloned. Which of the following processes was used?
TLS Online TPP Program

#Question id: 23864

#Unit 13. Methods in Biology

Which of the following problems with animal cloning might result in premature death of the clones?