What can fish color tell us about human pigmentation Skin co

What can fish color tell us about human pigmentation? Skin color is often one of the first traits people notice in each other. Studies in zebra fish uncovered a mutation that altered a transport protein and resulted in light-colored tosh. This discovery led to the finding that the same gene in humans has a strong influence on skin pigmentation in many populations Researchers compared the amino acid sequences of the transport protein in zebra fish, puffer fish. mice, and humans. They found many stretches with identical sequences in all four species. Does this mean that the corresponding mRNA base sequences are also the same in these four species? Explain why or why not. No because the redundancy of the genetic code means that it is possible for deferent codons to specify the same amino acids Yes, because the amino acid sequences synthesized on base of mRNA sequence base is a result of translation, so if amino acid sequences are identical, the mRNA base sequences will be identical too. Yes. because ail codons specify the same amino acids in all organisms. No. because stretches with identical sequences in this species mean that the corresponding rRNA base sequences are also the same.

Solution

No, because the redundancy of the genetic code means that it is possible for different codons to specify the same amino acids.

This is due to the fact that 2 or more codons code for the same amino acids as there are more codons (64) than the amino acids(21). For example, the amino acid glutamic acid is specified by GAA and GAG codons. So it is possible that in one species glutamic acid is coded by GAA and in another species by GAG. Hence the mRNA of different species may be different even though they have same amino acid sequence.