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A person with phenotype AB blood must have genotype AB blood. Meaning that the person has inherited both A and B alleles.
Only one dominant allele is needed to display the dominant phenotype. Dominant alleles are expressed when present, masking the effect of recessive alleles.
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A person with A negative blood may have genotype AO or AA. The genotype for the Rh factor must be negative in both alleles.
When two of the same alleles are needed to be seen in the offspring's genotype, those alleles are referred to as homozygous alleles. This means that both alleles at a specific genetic locus are identical, leading to the expression of a specific trait.
He has no E alleles.
A patient with O negative blood is considered the universal donor. This phenotype is associated with just one genotype; both alleles must be "O" and both alleles must be negative.
No, not all alleles have to match in a maternity DNA test. A certain number of genetic markers are compared between the child and the supposed mother to determine if there is a biological relationship. The more alleles that match, the higher the probability of maternity.
How many alleles for black fur are in the sample population and what percentage of allele frequency does that reprent?Read more: How_many_alleles_for_black_fur_are_in_the_sample_population_and_what_percentage_of_allele_frequency_does_that_reprent