1. References

Pseudoallelism is a state in which two genes with similar functions are located so close to one another on a chromosome that they are genetically linked.^[1][2] This means that the two genes (pseudoalleles) are nearly always inherited together. Since the two genes have related functions, they may appear to act as a single gene. In rare cases, the two linked pseudoalleles can be separated, or recombined. One hypothesis is that pseudoalleles are formed as a result of gene duplication events, and the duplicated genes can undergo gene evolution to develop new functions.

Characteristic of Pseudoalleles:

1. These are closely linked allele within which crossing over occur.
2. They affect the same character.

Example:

Red eye colour of Drosophila has different mutants like white and apricot.They affect pigmentation i.e., affect the same character.So, they are allelic.They can undergo recombination,i.e.,they are nonallelic.

References

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