Is xeroderma pigmentosum chromosomal ??

Xeroderma pigmentosum is caused by mutations in genes that are involved in repairing damaged DNA . Inherited mutations in at least nine genes have been identified. The condition is inherited in an autosomal recessive manner. People with XP need total protection from sunlight.XP is an autosomal recessive genetic condition caused by alterations (mutations) in nine different genes. Eight of the genes make up the nucleotide excision repair pathway (NER) that identities and repairs UV induced DNA damage. One of the most frequent defects in xeroderma pigmentosum is an autosomal recessive genetic defect in which nucleotide excision repair (NER) enzymes are mutated, leading to a reduction in or elimination of NER. If left unchecked, damage caused by ultraviolet light can cause mutations in individual cell's DNA. A child presenting with severe sunburn after their first exposure to sun may be a clue to the diagnosis of xeroderma pigmentosum. Xeroderma pigmentosum can usually be conclusively diagnosed by measuring the DNA repair factor from skin or blood samples.

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imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.