The research was carried out by using 32 living species genome samples.
The genome organization of the oldest mammal common ancestor has been recreated by an international research team.may aid in both the study of mammalian evolution and the preservation of contemporary species., which lived approximately 200 million years ago, most likely resembled the earliest mammal progenitor.
had two sex chromosomes and 19 autosomal chromosomes, which govern the inheritance of an organism's traits aside from those controlled by sex-linked chromosomes.In all 32 genomes, the scientists found 1,215 clusters of genes that always appear in the same order and on the same chromosome.
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