# A simple unified explanation of several genetic issues on today's human population and on archaic humans

## TL;DR

This paper proposes a simple mathematical model to explain various genetic phenomena observed in modern humans, Neandertals, and Denisovans, including genetic variation, origins of mtDNA and Y-chromosomes, and regional genetic differences.

## Contribution

It offers a unified, simple explanation for multiple debated genetic issues across ancient and modern human populations using a mathematical approach.

## Key findings

- Low genetic variation in modern humans and Western Neandertals.
- All current human mtDNA and Y-chromosomes trace back to Africa.
- European gene pool is largely recent, from Neolithic times.

## Abstract

We will give a simple, unified, possible explanation of several debated genetic issues on today's humans, Neandertals and Denisovans. In particular it is shown by means of a simple mathematical model why there is little genetic variation in todays's human population or in Western Neandertal population, why all mtDNA and y-chromosomes in today's humans seem to have African origin with no trace of Neandertal nor Denosovan mtDNA or y-chromosomes, why a big part of the European gene pool is young (from Neolitic time), and why today's East Asians have mode Neandertal genes than today's Europeans.