Question

Hybrid vigour is referred to __________

(a) superior phenotype of a hybrid

(b) increased fertility of a hybrid

(c) increased mortality of a hybrid

(d) decreased function of a hybrid

The question was posed to me in semester exam.

The origin of the question is Genes, Chromosomes and Genomes in division Bioenergetics, Enzymes, Metabolism, Genes, Chromosomes and Genomes of Cell Biology

Answer 1

Right option is (a) superior phenotype of a hybrid

For explanation: Hybrid vigour is the phenomenon of increased vigour in the hybrids as compared to both of its parents. This phenomenon came to light in the 20th century in corn F1 hybrids. The resulting hybrid plant had a higher growth rate, was phenotypically superior and had increased yield as compared to both the parents.