The early embryonic development in amphibians and aves serve as two different model plans of development. In the former the germ layer formation is initiated from a fluid-filled ball like […]
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CSIR NET Life Science Previous Year Questions and Solution on Development Biology
The First Organ System to Develop During Human Organogenesis: The Cardiovascular System
5 The first organ system to develop during organogenesis is the (1) Integumentary system (2) Respiratory system (3) Excretory system (4) Cardiovascular system Organogenesis—the process by which organ systems are […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Impact of Fgf8 Overexpression on Primitive Streak and Mesoderm Formation during Avian Gastrulation
65. The major structural characteristic of avian gastrulation is the primitive streak, which becomes the blastopore lips of amniotic embryos. Migration through the primitive streak is controlled by Fgf8. What […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Fusion of Precursor Cells: The Building Block of Skeletal Muscle Development
Fusion of precursor cells is an essential phenomenon in development of (1) Nerve (2) Skeletal muscle (3) Spleen (4) Liver Fusion of precursor cells, specifically myoblasts, is a vital and […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Key Events in Chick Embryogenesis: Cleavage, Hypoblast Formation, Primitive Streak, and Hensen’s Node
Following statements were made about the events occurring during chick development. A. The fertilized chick egg undergoes discoidal meroblastic cleavage; however the cleavage does not extend into the yolk cytoplasm. […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Decoding cAMP Signaling in Dictyostelium discoideum: Truths About Aggregation, Mutant Spores, and Key Enzymes
cAMP signalling plays a very important role in the development of Dictyosteliumdiscoideum. Below are few statements related to it. A. Every amoeba at the time of aggregation has the potential […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Hensen’s Node as the Avian Equivalent of the Amphibian Spemann Organizer: Axis Induction and Genetic Markers
Hensenis node is established as the avian equivalent of the amphibian dorsal blastopore lip. The following observations are presumed to be support of the same. A. It is the region […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Adenyl Cyclase Gene Mutations in Dictyostelium discoideum: Understanding cAMP’s Role in Development and Differentiation
cAMP signalling plays a very important role in the development and differentiation of Dictyostelium discoideum. This morphogen’ is synthesized by different adenyl cyclases expressed at different stages of its life […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Chick Embryo Germ Layer Formation: Role of the Epiblast and Primitive Streak in Early Development
The part of the embryo from which the ectoderm, mesoderm and endoderm are formed in chick is known as (1) primitive streak (2) hypoblast (3) epiblast (4) cytotrophoblast Introduction In […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Fate and Compensation of Frog Blastula Cells: Animal Pole to Vegetal Pole Transplantation Outcomes
Cells from an early frog blastula were remove from the animal pole and used to replace cells from the vegetal pole of the blastula. The following events may be expected. […]
