Chromosome Y can only be found in men. It has the form and function distinctive because it involves sex-determination during embryonic development (A male contains a human X chromosome and one Y chromosome).
Other than that, Y chromosome DNA contains paternal which is used in determining the father of descent (patrilineality), as it is passed from father to son. This is because most of the Y chromosome passes virtually unchanged from generation to generation.
In search of our ancestors from the parent help us understand our roots in our history and anthropology.
Basically, random mutation causes slight changes in the Y chromosome that allow us to elucidate total generations of the two Y chromosomes, which are derived from a common ancestor is also known as time to the most recent common ancestor (TMRCA).
Based on this concept, it is possible to clarify the relationship between the two men to make sure they are really connected with each other. The cutting edge of DNA testing, several genetic markers are used to estimate how men are closely linked to each other what can be done in a very short time and thus trace the paternal line.
There are five million years ago, our Y chromosome had traveled around the world since humans and our primate cousins were separated evolutionary. Y chromosome, Adam was discovered by comparison test on the men in the world capable of building a family tree of mankind shows that the most recent common ancestor of men lived about 60000 years in Africa.
The significance of the date of our common ancestor Y chromosome is that actually gives us an upper limit where our species began to leave Africa between 60000 and 50000 years. This is known as the "Out of Africa" theory.
Although the name "Adam" is just a metaphor, monitoring the results of the most recent common male ancestor of mankind reflect the origin and spread throughout the world are in biblical range of approximately 10000 to 60000 years.
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