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Question

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

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

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.

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