The nucleotide triplet that encodes an amino acid is called a codon. Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases).
<span>Plant species a has a diploid chromosome number of 18. plant species b has a diploid chromosome number of 10. a new species c arises as an allopolyploid of species a and b. Tthe most likely diploid chromosome number of species c is 28.</span>