Homologous chromosomes each have different forms of a gene on them (one from your mom and one from your dad) These different “forms” are known as Alleles.
These can either be dominant or recessive. Those that are recessive are Hidden if a dominant allele is present.
The two alleles an organism has for a specific trait is known as its Genotype. The actual characteristic that it has (the Physical appearance is known as its Phenotype
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