A small portion of the human transport protein amino acid sequence is shown belo

Question

A small portion of the human transport protein amino acid sequence is shown below. The upper sequence is associated with darker skin, and the lower sequence is associated with lighter skin What DNA base-pair change created the light-skin form of the human protein from the gene that coded for the dark-skin form? The base-pair change must have been from a CC to a GC in the first position of the codon. The base-pair change must have been from an AC to an UC in the first position of the codon. The base-pair change must have been from a GC to an AC in the first position of the codon. The base-pair change must have been from an AC to a CC in the first position of the codon.

Explanation / Answer

The base pair change must have been from GC to AC in first position.

note - change in two base pair GC to AC can chamge GCC which codes for Ala to ACC which codes for thr

thus change any two base pair change the codon sequence coded for amino acid

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