Simple review chromosomes

chromosomes

Y chromosome is the only chromosome that you find in all males. It has distinctive shape and function as it involves in sex-determination during embryo development A human male contains one X chromosome and one Y chromosome . Basically, random mutation causes slight changes in Y chromosomes that enable us to elucidate total generations of the two Y chromosomes that are derived from a common ancestor also known as Time to the Most Recent Common Ancestor TMRCA . Y chromosome Adam was discovered from comparison test on men around the world which able to construct a family tree for mankind that indicates the most recent common male ancestor lived about 60,000 years ago in Africa. The importance of the date of our common Y chromosome ancestor is that it effectively gives us an upper limit when our species began to leave Africa between 60,000 and 50,000 years ago.
chromosomes
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