The XY chromosomes refer to the gender chromosomes and a mutation to where a child is born with XXY chromosomes would mean that the child Would have Klinefelter syndrome. A child with XX chromosomes is a female and a child with XY chromosomes is a male. The mutation has an extra gamete.
For mountains to form the plates need to be going towards eachother and b is the only option in which that occurs besides C but that causes earthquakes
