Question

Which is correct sequence of egg layers from outside to inside?

• A. Radiata, Proliferous and Pellucida
• B. Proliferous, Radiata and Pellucida
• C. Proliferous, Yolk Sac and Radiata
• D. None of the above

Answer 1

The correct option is B Proliferous, Radiata and Pellucida

The ovum is enclosed by two additional egg coats: inner, transparent, non cellular zona pellucida and outer thick corona radiata. Zona pellucida is secreted by ovum itself, and thus a primary egg membrane. It is composed of three different glycoproteins. The corona radiata is formed of radially elongated follicular cells. It is a secondary egg membrane.

So, the correct answer is 'Proliferous, Radiata and Pellucida'.