Question

In summer squash if you cross different varieties of true breeding sphere shaped squash, you get a disk shaped progeny. What phenomenon is seen here?

(a) Gene interaction

(b) Epistasis

(c) Multiple allele

(d) Codominance

The question was posed to me during an interview.

Enquiry is from Gene Interactions in division Extension and Deviation from Mendelian Genetic Principles of Cytogenetics

Answer 1

Right option is (a) Gene interaction

The explanation: As the cross lead to the production of a novel phenotype, it is not the case of epistasis but rather a case of gene interaction.