The phenomenon, whereby animals change the relative time of appearance and rate of development of characters present in their ancestors, is called 

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#Question id: 16136

#Unit 13. Methods in Biology

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   

 

By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:

 

Is there a second STS at which you would like to sequence PCR products obtained using BACs as templates? If so, which BACs would you test in this way, and what sequencing results might you predict for each of the BACs tested?

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#Question id: 28356

#Unit 5. Developmental Biology

The following statements were made regarding the patterning of anterior-posterior body plan of Drosophila:

A. Mutant Nanos mRNA that leads to the deletion of abdomen region

B. Nanos mutant phenotype expressed  two head phenotype

C. Nanos is a posterior morphogenic protein

D. It involves to represses the caudal mRNA

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#Question id: 1745

#Unit 4. Cell Communication and Cell Signaling

On injection into mice, bovine serum albumin conjugated with dinitrophenol (DNP) behaves as a:

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#Question id: 31384

#Unit 5. Developmental Biology

In drosophila, the third thoracic segment is transformed into another second thoracic segment due to:

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#Question id: 13145

#Unit 8. Inheritance Biology

We can construct a genetic map by considering the recombination frequencies for each pair of genes. The recombination frequency between a and b is 50%, a and c is 50%, and b and c is 20%. What will be the correct prediction about this statements;

a)  Recombination frequency between genes a and b and gene a and c is expected with independent assortment

b) The genes a and b and gene a and c may either be on different chromosomes or be very far apart on the same chromosome;  so we will place them in different linkage groups

c) The gene b and c are linked

d) The gene b and c are unlinked

Which of the following is the correct sequence?