Chromosomes of all races of human are

Now,the sequencing of total genomes is getting less expensive day by day. Soon it may be affordable for a common man to get his genome sequenced. What in your opinion could be the advantage and disadvantage of this development?

The Human Genome Project formally began in $A$ and was completed in $B$.

The haploid content of human $DNA$ is

In humans, the first chromosome has the most genes $(2968)$ and the $Y$ chromosome has the fewest genes $(231)$.

At how many locations in humans have scientists identified the occurrence of single-base $DNA$ differences?