DNA similarity to humans - is this video accurate?

[Tomenable]

Do you think that the video is really accurate?

I'm a bit surprised for example that the Koala ranked the same as the Chicken.

Shouldn't all mammals be closer than any bird?

 

[Tomenable]

^^^
Well actually Koala is the last mammal in that list and Chicken is the first bird.

 

[Tomenable]

When it comes to humans, according to prof. Luiza Handschuh:

"(...) The genomes of humans, animals, plants, and bacteria differ in length and nucleotide sequence, but the more closely related the species, the more of similar fragments they have. The human genome is large and contains over 3 billion nucleotides. If we compare the genomes of individual people who are not close relatives, we will find that they are identical on average in 99.85%. However, the seemingly small percentage of differences (0.15%) related to the occurrence of various types of mutations or variable (polymorphic) sites, amounts to as much as 4.5 million nucleotides. Many of these differences do not translate in any way into the physical characteristics of the organism, but they are valuable from the point of view of genetics and population genomics, forensic medicine, and genetic genealogy. (...)"

 

[Riverman]

I always wonder about how you quantify this. E.g. how do you quantify if a species has a different number of chromosome pairs? More less DNA in total? Also, even more important that this general sequence similarity is the production of proteins and active genes. Again, how being those compared and many other aspects. I think its not as easy to break this down to percentages.