Here's a breakdown:
* Alleles: Different versions of a gene.
* Dominance: The phenomenon where one allele (the dominant allele) masks the expression of another allele (the recessive allele) at the same gene locus.
Example: Brown eyes are dominant over blue eyes. If someone inherits one allele for brown eyes and one for blue eyes, they will have brown eyes because the brown eye allele is dominant.
There are two types of dominance:
* Complete dominance: The dominant allele completely masks the recessive allele.
* Incomplete dominance: The dominant allele doesn't completely mask the recessive allele, resulting in a blended phenotype.
Let me know if you'd like more detail about any of these concepts!