Tag: CSIR NET Life Science Free Test on Drosophila Development

In which one of the following developmental events, the fate of maternal somatic cell is determined first, which then the fate of the developing embryo? (1) 1.The specification of primary […]

If an early cleavage stage wild type Drosophila embryo is injected with bicoid mRNA at the posterior pole then (1) head structures develop at posterior pole, while the same is […]

The following statements were made regarding the patterning of anterior-posterior body plan of Drosophila: A. Microinjection of bicoid mRNA in the middle of a bicoid-deficient embryo leads to formation of […]

9. Three embryos, X (wild type), Y (mutant for bicoid) and Z (mutant for nanos) were injected with bicoid mRNA in their posterior pole at early cleavage stage. What would […]

Cytoplasmic determinants coding for anterior structure of Drosophila embryo if injected elsewhere in the recipient embryo, would lead to (1) normal development. (2) formation of additional ectopic head. (3) degeneration. […]

Which of the following maternal effect gene products regulate production of anterior structures in Drosophila embryo? (1) Bicoid and Nanos (2) Bicoid and Hunchback (3) Bicoid and Caudal (4) Nanos […]

One of the most important gene, involved in dorsal—ventral axis determination in Drosophila is dorsal. It codes Dorsal protein which (1) is taken up into the nuclei of cells and […]

An embryo lacking bicoid is injected with bicoid m-RNA at middle portion. It will result into (1) Two heads and no tarsons (2) Head in middle and tarsons at both […]

The emergence of polarity of a drosophila embryo is the result of (1) Positive and negative charges interacting in early development. (2) cytoplasmic differences between cells. (3) cytoplasmic determinants within […]