The truth inherent in
evolutionary conservation has now been realized that humans have DNA stretches
faithfully transmitted and brilliantly copied for billions and billions of
years. Human genome comprises of large number of DNA sequences whose presence
is well proven among organisms evolved during Pre Cambrian and thereafter.
Human genome has many genes exactly similar to variety of organisms referrable
to animalia; this short review highlights about DNA sequences also found among
some plants. The hypothesis is that DNA stretches must have been ceaselessly
replicated during early phases of evolution and DNA sequences got randomly
distributed among trillion cells and evolving organisms. This gets upheld by
series of observations based on Southern hybridization studies and also, by
blasting sequenced genomic DNA from small aquatic weed the quillwort, Isoetes
pantii, and Ginkgo biloba (maiden hair tree ) with the human genome using gene
bank public database ( http:www.ncbi.nim.nih.gov ). Ancestors and related species
of these extant genera have had flourished during 150 to 300 million years ago;
this is intriguing that these plants also possess some genes exhibiting 50 to
80% concordant DNA stretches of many loci on human chromosomes.
Relevance of this unity and diversity among dispersal of DNA sequences is that human genes are not “exclusive” to human being. So, obviously , our genome is an admixture - package of DNA sequences; many of them had had got randomly dispersed several billion years ago in organisms which were, then on the track of biological evolution sometime in Pre Cambrian.
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