Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 5903
TLS Online TPP Program

#Question id: 7103

Patterning of the Xenopus mesoderm along the dorso-ventral axis involves an antagonistic relationship between chordin and BMP-4. Is there an analogy here to dorso-ventral patterning in the Drosophila embryo?

#Unit 5. Developmental Biology
  1. Yes, the Drosophila homolog of BMP-4, Decapentaplegic (Dpp), is antagonized by the Drosophila homolog of chordin, short gastrulation (Sog), in patterning of the dorso-ventral axis.
  2. Yes, Drosophila also uses BMP-4 to specify ventral fates and chordin to specify dorsal fates.
  3. Yes, the Drosophila Dorsal protein is identical to the vertebrate BMP-4 protein, and specifies the ventral region of the embryo.
  4. No. the closest analogy from Drosophila would be the antagonism between Hunchback and Nanos, but neither of those are signalling molecules, and they act to pattern the antero-posterior axis.
More Questions
TLS Online TPP Program

#Question id: 10680

#Unit 10. Ecological Principles

Which of the following organism usually show exploitation competition?
TLS Online TPP Program

#Question id: 10681

#Unit 10. Ecological Principles

Which of the following is not condition for commensalism?
TLS Online TPP Program

#Question id: 10682

#Unit 10. Ecological Principles

if 30 individuals of species 2 take up the same amount of resources as 5 individual of species 1 then the per capita competitive effects on species 1 of species 2 is
TLS Online TPP Program

#Question id: 10683

#Unit 10. Ecological Principles

Which of the following interaction shown in figure
TLS Online TPP Program

#Question id: 10684

#Unit 10. Ecological Principles

Which one of the following statements is INCORRECT?
TLS Online TPP Program

#Question id: 10685

#Unit 10. Ecological Principles

figure show population growth in two species A ana B . Interaction between