• The Ancon sheep was produced from an ordinary sheep in single step in 1891. The mutaed sheep was short height (Figure 9.3) and it was useful for farmers as they could not be able to jump from low stone fences.

 

Figure 9.3: The ancon sheep and their noral parents.

• Hornless or polled Hereford cattle were produced in single step in 1889 from normal parents.
• The hairless cats, dog and mice were produced from normal parents in single step.

3. Oenothera lamarckiana has 14 chromosomes but the mutants were having 16,20,22,24,28 and 30 chromosomes.

4. Mutations are genetically linked and inheritable.

5. A single large mutation can produce new species in plant. For example, Delicious apple.