10 Differences between Continuous and Discontinuous Variations in Inheritance

Some of the major differences between continuous and discontinuous variations in inheritance are as follows:

Continuous Variations:

1. The variations fluctuate around an average or mean of species.

Continuous and Discontinuous Variations in Inheritance

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2. Direction of continuous variations is predictable.

3. They are already present in the population.

4. Continuous variations are formed due to chance segregation of chromosomes during gamete formation, crossing over and chance pairing during fertilization.

5. They can increase adaptability of the race but cannot form new species.

6. Continuous variations are connected with the mean or average of the species by intermediate stages.

7. The continuous variations are also called fluctuations.

8. When represented graphically, continuous variations give a smooth bell shaped curve.

9. They are very common.

10. Continuous variations do not disturb the genetic system.

Discontinuous Variations:

1. A mean or average is absent in discontinuous variations.

2. The direction of discontinuous variations is unpredictable.

3. Discontinuous variations are new variations though similar variations might have occurred previously.

4. Discontinuous variations are produced by changes in genome or genes.

5. Discontinuous variations are the fountain head of continuous variations as well as evolution

6. These variations are not connected with the parental type by intermediate stages.

7. Discontinuous variations are also known as mutations or sports.

8. A curve is not produced when discontinuous variations are represented graphically.

9. These variations appear occasionally.

10. They disturb the genetic system of the organism.

Submitted by : Dr. Kai, Category : Difference, Tag : Genetics