#Question id: 1391
#Unit 4. Cell Communication and Cell Signaling
If an adult person has a faulty version of the human analog to ced-4 of the nematode, which of the following is most likely to result?
#Question id: 7140
#Unit 5. Developmental Biology
In thinking about the development of the wing imaginal disc of Drosophila, what is the significance of 'compartments'?
#Question id: 7242
#Unit 5. Developmental Biology
The
cells of posterior marginal zone act as
the equivalent of the amphibian Nieuwkoop center because:
A.
once the PMZ has formed, it controls the other regions of the margin.
B.
Cells of PMZ initiate other regions of the margin from forming their own
primitive streaks.
C.
the entire marginal zone produces Wnt8c (capable of inducing the accumulation
of -catenin) and secrete Vg1, a member of the TGF-family.
D.
The PMZ cells secretes nodal protein and Nodal activity is needed to initiate
the primitive streak.
E.
When placed in the anterior region of the marginal zone, a graft of PMZ tissue
(posterior to and including Koller’s sickle) is able to induce wnt signaling.
Which of the following option is correct?
#Question id: 12742
#Unit 13. Methods in Biology
#Question id: 29115
#Unit 8. Inheritance Biology
Given below, is the result of a complementation test for seven independent mutants (A to G). '+' represents complementation; '_' represents non complementation. Based on the above, which one of the following conclusions is correct
a) The mutations can be ordered in a three cistron as A-G-B-C-D-E-F
b) All mutations belong to a single cistron, but their order cannot be determined.
c) There are three cistrons, mutations A and G represent one cistron, B, C and D represent the second cistron and E and F represents the third cistron.
d) There are three linkage groups, mutations A and G represent linkage group-I, B, C and D represent linkage group-II, and E and F represents linkage group-III