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TLS Online TPP Program

#Question id: 7248

Planning of the Xenopus mesoderm along the dorso-ventral axis contains 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 is signalling molecules, and they act to pattern the antero-posterior axis
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TLS Online TPP Program

#Question id: 5273

#Unit 8. Inheritance Biology

Replica plating
TLS Online TPP Program

#Question id: 5274

#Unit 8. Inheritance Biology

Among the easiest of the mutations to isolate are those which
TLS Online TPP Program

#Question id: 5275

#Unit 8. Inheritance Biology

 The designation his- refers to
TLS Online TPP Program

#Question id: 5276

#Unit 8. Inheritance Biology

Donor Strain ABCDE transformation to   recipient strain abcde. Co-transformation check by using media with different supplement?

Media supplement

Growth

A

B

C

D

E

Yes

-

+

-

+

+

Yes

+

+

-

-

+

Yes

+

-

+

-

+

Yes

+

-

+

+

-

Yes

What is a order of gene ?
TLS Online TPP Program

#Question id: 5277

#Unit 8. Inheritance Biology

Deduce the genotype of bacteria strain was shown either growth presents or not in different media?

Media supplement

Minimal

Minimal + Arginine

Minimal + Methionine

Minimal + Arginine+ Methionine

Growth

No

Yes

     No

Yes

TLS Online TPP Program

#Question id: 5278

#Unit 8. Inheritance Biology

What is the co-transduction frequency for the A and B genes, from the following dataset?(Assume that there has been selection for the A+ form of the A gene). Genotype                                Number

 A+B+C+                                   10

 A+B+C-                                    30

A+B-C+                                     20

 A+B-C-                                     40