Webbed neck along with receding jaw and drooping eyes are its common symptoms.

Klinefelter syndrome or Klinefelter's syndrome, is the set of symptoms resulting from additional X genetic material in males. This extra barr body is due to presence of extra X chromosome in it.

It is also called as trisomy of chromosome 21. So, this occurs due to the entire chromosomal aberration and not just a single gene.

Prions are the protein particles, which are responsible for the mad cow disease.

Leprosy, also known as Hansen's disease (HD), is a chronic infection caused by the bacteria Mycobacterium leprae and Mycobacterium lepromatosis.

Abnormal growth of the tumor results by abnormal tendency of mitosis in the tumor cells. These keep on dividing and results into tumor.

It is trisomy of chromosome number 21. Hence,  it does not involve the change in sex chromosome number.

It is the set of symptoms resulting from additional X genetic material in males.

It is a specific chromosomal abnormality that is associated with chronic myelogenous leukaemia (CML).

Sickle cell anemia is a blood disease in which red blood cells reveal an abnormal crescent (or sickle) shape when observed under a conventional microscope. It provides immunity against malaria.

It is the disorder of eye, which develops by the improper functioning of optic nerve.

Cancer cells are adapted in undergoing active mitosis.

Metastasis or metastatic disease, is the spread of a cancer from one organ or part to another non-adjacent organ or part.

It is a chromosomal abnormality in which all or part of one of the X chromosome is absent.

Cancer caused in lungs, kidneys and stomach is called as carcinoma.