Two offsprings developed in the same uterus from fertilisation of two different ova are

Options

A. Monozygotic twins
B. Dizygotic twins
C. Fraternal twins
D. Both (B) and (C)

Answer

D

Explanation

Types of eggs based on the distribution of yolk in eggs.
1. Homolecithal eggs: Yolk is uniformly distributed in the cytoplasm of Egg. e.g.: Echinodermata and proto chordata.
2. Meiolecithal eggs (Discoidal egg): Yolk is distributed all over cytoplasm except a disc like area for the nucleus.e.g.: Reptiles, birds and egg laying mammals (prototherians).
3. Telolecithal eggs: Yolk is found on one sideor vegetal half. e.g.: Amphibians (frog).
4. Centrolecithal eggs : Yolk is present at centre. e.g.: Insects.