The figure above represents a late zebrafish gastrula. The following concepts may be proposed during further development of the embryo. A. The concentration of FGF decreases from the yolk towards […]
Tag: Early Development in Animals
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CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
How Sperm Entry and PAR Proteins Establish the Anterior-Posterior Axis in C. elegans
11. Gradients of morphogens determine the future dorsal- ventral and anterior-posterior axes of the developing embryo in many organisms. How is the anterior- posterior axis developed in C. elegans? (1) […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Matching Fate Maps and Cleavage Patterns: Finding the Right Combination in Embryology
10. Given below are fate map of two organisms and the pattern by which embryos undergo cleavage. Which of the following is/are the right combination(s)? (1) B only […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Matching Embryonic Cleavage Patterns with Representative Species: A Comprehensive Guide
The table below lists cleavage pattern and names of species. Match the cleavage patterns with the species. (1) A- i; B- ii; C- iii; D- iv (2) A- ii; B- […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
A Detailed Guide to Embryonic Cleavage Patterns and Their Species Associations
8. Match the following cleavage patterns with the species in which they occur. (1) A-iv, B-iii, C-i, D-ii (2) A-iii, B-i, C-iv, D-ii (3) A-ii, B-iii, C-i, D-iv […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
How Yolk Distribution and Cytoplasmic Factors Determine Embryonic Cleavage Patterns
The pattern of embryonic cleavage specific to a species is determined by two major parameters. (A) The amount and distribution of yolk protein within the cytoplasm. (B) The factors in […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Cleavage in Centrolecithal Eggs: The Superficial Cleavage Pattern
Centrolecithal eggs show (1) superficial cleavage (2) displaced radial cleavage (3) bilateral cleavage (4) discoidal cleavage Introduction Centrolecithal eggs are a type of egg where the yolk is centrally located […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Amphibian Embryonic Development: Holoblastic Radial Cleavage Explained
5. Amphibian zygote will generally undergo (1) Holoblastic radial cleavage. (2) Holoblastic rotational cleavage. (3) meroblastic bilateral cleavage. (4) meroblastic rotational cleavage. Introduction Amphibians, such as frogs and salamanders, […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
The Rotational Cleavage Pattern in Mammalian Embryonic Development
What is the pattern of cleavage observed in mammals? (1) Radial (2) Spiral (3) Rotational (4) Bilateral Introduction Embryonic cleavage is the series of cell divisions that transform a fertilized […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Mammalian Embryonic Cleavage: The Holoblastic Rotational Pattern
Which kind of cleavage is shown in mammals? (1) Holoblastic rotational (2) Meroblastic rotational (3) Holobastic radial (4) Meroblastic radial Introduction Embryonic cleavage is the initial phase of rapid cell […]
