a pentose sugar important as a component of ribonucleic acid
However, the ribose sugar component of RNA is slightly different chemically than that of DNA. RNA has a 2' oxygen atom that is not present in DNA. Other fundamental structural differences exist.
any of the forms of a gene that can occupy the same locus
Methylation also plays an important role in genomic imprinting, which occurs when both maternal and paternal alleles are present but only one allele is expressed while the other remains inactive.
an allele that produces its characteristic phenotype only when its paired allele is identical
On the other hand, a recessive allele will be expressed only if there are two identical copies of that allele, or for a male, if one copy is present on the X chromosome.
Created on 一月 7, 2011
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