The U.S. Constitutionâs 10th Amendment is arguably the most important of all the amendments in the brilliant document that helped shape the United States.
Not even identical twins have the same DNA--although theirs would be far closer than anyone else's. DNA changes over time. Odds of two siblings having the same DNA who did not split from the same zygote are vanishingly small.
Best Answer: A diploid organism has two copies of each gene, one on each homologous chromosome. The two copies of the allele can be the same, i.e. the organism is homozygous, in which case there is only one allele present for that gene. If the two copies are different, the organism is heterozygous for that gene and there are two alleles present. So the answer is b. In your example, a person can only have 1 hair colour, so it only contains the alleles for that colour.