When an effect caused by a gene or gene pair at one locus interferes with or hides the effect caused by another gene or gene pair at another locus, such phenomenon of gene interaction is called:
Correct answer: A. Epistasis
- A. Epistasis
- B. Pleiotropy
- C. Overdominance
- D. Codominance
Explanation
The correct answer is Epistasis. Epistasis involves the interaction of different genes, where the effect of one gene pair masks or alters the expression of another gene pair, leading to a modification of the expected phenotype. It is not to be confused with pleiotropy, where a single gene affects multiple traits, or with codominance and overdominance, which involve different forms of gene expression but not interactions across loci.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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