What disease is caused by a gene on the X chromosome?

Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome is a genetic condition affecting males, and it often isn’t diagnosed until adulthood.

How many genes are on the X chromosome?

Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. The X chromosome likely contains 800 to 900 genes that provide instructions for making proteins.

What happens if a baby is XXY?

Children with XXY syndrome may require academic, social, and emotional support. Adolescents may enter puberty at the normal time, but then have decreased facial and body hair, decreased muscle development, smaller testicles, and swelling of the breasts (gynecomastia). Depression and anxiety may occur at this age.

What are X chromosome diseases?

Males have an X chromosome (from the mother) and a Y chromosome (from the father) whereas females have two X chromosomes – one from each parent. Some examples of X chromosome disorders are Jacobs syndrome, Fragile-X syndrome and Turner syndrome.

What is X and Y linked disorder?

X-linked disorders are ones where the disease derives from a gene, or genes, on the X-chromosome. And conversely, Y-linked disorders derive from a gene, or genes, on the Y-chromosome. As for the latter, only males can have Y-linked disorders because females do not possess a Y-chromosome.

What is an X chromosome called?

The other 22 pairs of chromosomes are called autosomes. Individuals having two X chromosomes (XX) are female; individuals having one X chromosome and one Y chromosome (XY) are male. The X chromosome resembles a large autosomal chromosome with a long and a short arm.

What are X linked traits?

X-linked traits are sex-linked traits determined by genes on the X-chromosome. Some X-linked traits in humans are; red-green colorblindness, Duchenne muscular dystrophy , hemophilia A , and hemophilia B . These are all recessive traits, and affect males with a much greater frequency than females.