Question

What is the meaning of homology

Answer 1

Homology is the existence of shared ancestry between a pair of structures, or genes, in different taxa. 

Answer 2

The organs which have common origin, embryonic development and same tundamental structure but perform similar or different functions are called as homologous organs and this phenomenon is called Homology.

Examples:-

1. Mouth parts of insects:-

(i) Cockroach (Biting & Chewing)

(ii) Honey bee (Lapping & Chewing)

(iii) Mosquito (Piercing & sucking)

2. Testes in male and ovaries in female

3. Potato and Ginger:- Both are modified shoot.

4. Radish and Carrot:- Both are modified roots.

5. Molecular homology:- Homology found at molecular level. For example the plasrna proteins found in the

blood of man and apes are similar.