Which one of the following statements with respect to development in amphibians is correct? (1) Gastrulation begins with the invagination of bottle cells, followed by coordinated involution of the mesodermal […]
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CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Morphogenesis: The Crucial Role of Cellular Movements in Animal Development
23. Which one of the following developmental processes in animals is more dependent on cellular movements? (1) pattern formation (2) morphogenesis (3) cell differentiation (4) growth Introduction Development in […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Epiboly: The Coordinated Spreading of Epithelial Sheets During Embryonic Development
Movement of epithelial sheet spreading as a unit to enclose deeper layers of the embryo is termed as (1) Epiboly (2) Emboly (3) Involution (4) Ingression Introduction Embryonic development involves […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Effects of Cytoplasmic Determinants on Anterior Structure Formation in Drosophila Embryo
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. […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Maternal Effect Genes Regulating Anterior Structures in Drosophila Embryo: The Role of Bicoid and Hunchback
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Typical and Atypical Cell Movements During Gastrulation
Which one of the following is NOT a typical movement pattern observed during gastrulation? (1) Involution (2) Epiboly (3) Furrowing (4) Delamination Introduction Gastrulation is a critical phase in embryonic […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Role of the Dorsal Protein in Drosophila Dorsal-Ventral Axis Formation
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Effects of Bicoid mRNA Injection in the Middle of a Drosophila Embryo
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 […]
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 […]
