look: phylogenic placement of these animal kingdom members dont change eventhough I took COX1 gene from then and split it in halfthen one half of the gene is compared between organisms and later second half of the gene is compared between same set of organisms: result is that branches differ by small amount of values but its small enough that placement wont changewhat is in it:-homos have 4 limbs-balanoglossus have 0 limbs but it has 6 gill slits(these two belong in deuterostomes)-opiliones have 8 limbs (walking legs)-tanystylym have 8 limbs (walking legs) but also other legs it wont use for walking(these two are protostomes)-hydra is not either a protostome or deuterostome, it is here to represent a descendant of the ancestor of both protostomes and deuterostomes, a split which happened 700 million years ago
if I put in squids to the algorithm (architeuthis = squid) then it cant decide whether squids are opiliones are closer to human tree of lifewhatever happens, tanystylum is closest to hydra, suggesting that they were the first complex animal evolving from hydras who are some of the simplest animals in existence and were formed 700+ million years ago and still survive
https://en.wikipedia.org/wiki/Long_branch_attraction
>>16991479what is weird that the change is very constant from start to the end in the gene, it doesnt matter if its split in halfstill the relationships between organisms stay the sameeventhough you would think 330 million yers of mutation would change even half of the gene completely, but it just doesnt, changes are small
>>16991428how does the computer know
>>16991482The COX1 gene is critical for energy production, as such it is heavily conserved (evolution disfavours changes in it). That is why the relationships don't change when you compare subsections of the gene.
