7.4 There are sporadic alterations of the universal code A vertebrates AGG= STOP Figure 7.9 Changes in the Insects genetic code in mitochondria Molluscs can be traced in phylogeny. The AUA=le Echinoderms AAA=Asn minimum number of Ne matodes independent changes is AUA= Met Platyhelminths A AAA=Asn generated by supposing that the AGC= S Molds AUA=Met and the aaa=asn UGA=Tr rp Yeasts AUA=Met changes each occurred CUN= Thr Plants Univ ersal independently twice, and that code the earlyaUA-Met change was reversed in echinoderms 消当Figure 7.9 Changes in the genetic code in mitochondria can be traced in phylogeny. The minimum number of independent changes is generated by supposing that the AUA=Met and the AAA=Asn changes each occurred independently twice, and that the earlyAUA=Met change was reversed in echinoderms. 7.4 There are sporadic alterations of the universal code