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It depends on the organism but humans have two alleles.
An organism with the alleles BB would be homozygous dominant.
Genetic Engineering phenotypedominantdominantgenetic engineeringgenotype
From their parents.
That would be the organisms genotype.
There is no particular relationship between organisms that have identical alleles for a particular trait.
When they are heterozygous.
It depends on the organism but humans have two alleles.
Genes
An organism with the alleles BB would be homozygous dominant.
Genetic Engineering phenotypedominantdominantgenetic engineeringgenotype
That would be the organisms genotype.
From their parents.
genotype
Having two different alleles for a trait is called heterozygous.
Organisms inherit their alleles from their parents. In sexual reproduction, the alleles are usually inherited from two parents. In asexual reproduction, the alleles are inherited from a single cell and are genetically identical to the parent.
homozygous