Klinefelter syndrome is an consequence of what type of mutation?
a. deletion
b. insertion
c. frame shift
d. nondisjunction

b. insertion

The Klinefelter syndrome is caused by an insertion mutation. It occurs when there is an existence of an excess or extra X chromosome in each cell that may cause an abnormality in the development of males. It usually affects the physical and cognitive development of male with symptoms varying from one person to another.  Kids with these type of disorder may experience  learning disabilities and even speech and language  problems.  These kids tend to be quiet and very sensitive. They can also be very passive.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.