15. What is the difference
between dominant allele and
recessive allele?

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Dominant allele is the that
determines phenotypical features
manifest in homozygous or
genotypes.
In Genetics the allele is
represented in , e.g., “A”, and
its allele is written in
, “a”.

In molecular terms the
recessive allele has nucleotide
sequence previously identical the
corresponding sequence in dominant
allele but that evolution was
inactivated by . This fact
explains the of the dominant
phenotype heterozygosity (since one
functional is still present).