Types of Variation Germinal and Somatic
Types of Variation Germinal and Somatic
There are two types of variations — Germinal and Somatic.
Germinal or Genetic Variations are caused either by differences in the numbers or structures of chromosomes or by differences in genes (units of heredity). Changes in genes are the primary sources of germinal variations. These variations are heritable. Height and eye colour are examples of germinal variations.
Somatic Variations result from several factors such as climate, food supply, environment, and interactions with other organisms. These variations are not due to changes in genes or chromosomes. They are not transmittable to future generations. Hence, they are not significant in the process of evolution
Which of the following are correct ? (a) The genetic variations are heritable. (b) Somatic variations are not due to changes in genes or chromosomes. (c) Somatic variations are not significant in the process of evolution . | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) Germinal variation and discontinous variation are the two types of variation in an organism . (b) The germinal variations are caused either by differences in the numbers or structures of chromosomes or by differences in genes . | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct ? (a) In an organism the height and eye colour are examples of germinal variations. (b) Somatic variations are not due to changes in genes or chromosomes. | |||
| Right Option : C | |||
| View Explanation | |||
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