Question

Shepherd’s purse has two shape heart and narrow. If you cross a true breeding heart to a true breeding narrow, F1 will give___________

(a) Heart

(b) Narrow

(c) A mixture of heart or narrow

(d) Disc shaped

The question was asked in class test.

My question comes from Duplicate Epistasis in division Extension and Deviation from Mendelian Genetic Principles of Cytogenetics

Answer 1

The correct option is (a) Heart

The explanation is: A heart shaped Shepherd’s purse is dominant over the narrow shaped one. Thus crossing the true breeding form of each will give a heterozygous condition in both the locus resulting in heart phenotype. Disc is a phenotype for summer squash gene interaction.