Question

Why do alleles occur in pairs?

Answer 1

Alleles:

1. An allele is one of or more variations of a DNA sequence (a single base or a segment of bases) at a given genomic location.
2. Alleles can occur in pairs or more than one allele affecting the phenotype of a particular trait.
3. As chromosomes arise in pairs for every characteristic, there are possible alleles.
4. The extraordinary variations of alleles occur as the DNA base sequence varies.
5. Such a combination of alleles for each characteristic is a genotype, which could be a combination of the available alleles.