Question

The eggs in which fate of every part of the egg becomes fixed are called as

• A. Cleidoic eggs
• B. Non-cleidoic eggs
• C. Mosaic eggs
• D. Regulative eggs

Answer 1

The correct option is C Mosaic eggs

• The cell can become specified for a particular fate by autonomous specification (one of the ways).
• Autonomous specification results from cell-intrinsic properties, which gives rise to mosaic development.
• So, during mosaic development, the cytoplasm of blastomere differentiate in the early stages of development with reference to the tissue of the adult.
• Reptilian eggs are laid on dry land. They have a water-proof shell and contain sufficient nutritive material (yolk and albumen) for the developing embryo. Such eggs are called cleidoic eggs.
• Amphibian eggs are laid in water, not protected by shells and without sufficient nutritive material for the complete development of the embryo. They are called non-cleidoic eggs. Generally, a non-cleidoic egg hatches into a larva.
• Regulative egg is an egg in which unfertilized fragments develop as complete, normal individuals.

Thus, the correct answer is option (C).