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 […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Mechanisms Underlying Polarity Emergence in Drosophila Embryos
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Delamination: The Splitting of Cell Sheets During Hypoblast Formation in Bird Embryos
The splitting or migration or one sheet of cells into two sheets as seen during hypoblast formation in bird embryogenesis is termed as (1) delamination (2) ingression(3) involution (4) invagination […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Impact of Dorsal Gene Mutation on Drosophila Embryonic Development
Dorsal mutant in Drosophila will result in (1) Dorsalization of ventral side (2) Ventralization of dorsal side (3) There would be no effect (4) Anterior-posterior pattern formation will be effected […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Involution: A Key Morphogenetic Movement During Gastrulation
Inward movement of an expanding outer layer spreading over the internal surface during gastrulation is termed as (1) invagination (2) Ingression (3) involution (4) delamination Introduction Gastrulation is a major […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
The Role of Ultrabithorax Gene in Drosophila Segment Identity and Phenotypic Outcomes
Homeotic selector genes are responsible for the specification of Drosophila body parts. Which one of the following identities would you expect if the ultrabithorax gene is deleted? (1) The third […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Ultrabithorax Gene Deletion Phenotype in Drosophila: Four Wings Instead of Two
Which of the following phenotypes is obtained upon deletion of the ultrabithorax gene in Drosophila? (1) Fly with four wings (2) Fly with six wings (3) Fly with no wings […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding the Embryonic Origin of Vertebrate Bones: The Role of the Mesoderm
Bones of vertebrates embryonic are derived from (1) ectoderm (2) epiderm (3) mesoderm (4) endoderm The bones of vertebrates during embryonic development are primarily derived from the mesoderm layer. The mesoderm, one […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Why Local hCG Production by the Blastocyst Is Essential for Human Embryo Implantation
14. Human chorionic gonadotropin (hCG) is known to facilitate attachment of blastocyst to uterus. In women with mutation in hCG gene, biologically inactive hCG was formed but implantation occurred. When […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
The Essential Role of Actin Filaments and Cofilin1 in Embryonic Compaction and Blastula Formation
Compaction during early embryonic development involves activation of actin filaments. Which one of the following inhibitors would prevent formation of the blastula from the morula? (1) An inhibitor that would […]
