Question

A hybrid is generally more vigorous than either of the parents, this is due to

• A. Homozygosity
• B. Heterozygosity
• C. Superior genes in hybrid
• D. Mixing of cytoplasm

Answer 1

The correct option is B Heterozygosity

Heterozygosity: it is defined as having different alleles at one or more corresponding chromosomal loci. Zygosity is the degree of similarity alleles for a trait in an organism. Most eukaryotes have two matching sets of chromosomes; that is, they are diploid. A diploid organism is heterozygous at a gene locus when its cells contain two different alleles of a gene. The cell or organism is called a heterozygote specifically for the allele in question, therefore, heterozygosity refers to a specific genotype.