Heredity and Evolution
Important Definitions and Terms
Q1: Define Genetics
Answer: Genetics is the branch of Biology which deals with the study of heredity and variation.
Q2: Define Heredity
Answer: Heredity refers to process by which certain features (inheritable) are transmitted from parent to offspring.
Q3: Define Variation
Answer: Offspring of same parents do not exactly resemble each other as well to their parents. It is called variation.
Q4: What are analogous organs?
Answer: The organs that have same functions but different structures and origin are called analogous organs. e.g. the wings of a bat and the wings of an insect are analogous.
Q5: What are homologous organs?
Answer: The organs that have the same structure, origin and components but may be performing different functions are called homologous organs. Eg: hands of a human and the forelimbs of a horse.
Q6: What are vestigial organs?