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1 Y chromosome infertility Description Y chromosome infertility is a condition that affects the production of sperm and causes male infertility which means it is difficult or impossible for affected. 1 How Genes Work 1 What are proteins and what do they do? Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for t 1 HEXA gene hexosaminidase subunit alpha Normal Function The HEXA subunitsubunit beta-hexosaminidase A. Specifically, the protein produced from the HEXA gene forms the alpha subunit of this enzyme 1RARA generetinoic acid receptor alphaNormal FunctionThe RARA gene provides instructions for making a transcription factor called the retinoic acid receptor alpha RARa A transcription factor is a prot 1 Chronic myeloid leukemia Description Chronic myeloid leukemia is a slow-growing cancer of the blood-forming tissue (bone erythrocyteserythrocytes leukocytesleukocytes( thrombocytes) that are involv 1 Age-related macular degeneration Description Age-related macular degeneration is an eye disease that is a leading cause of vision loss in older people in developed countries. Subtle abnormalities i 1 Dermatofibrosarcoma protuberans Description Dermatofibrosarcoma protuberans is a rare type of cancer that causes a tumor in the deep layers of skin. This condition is a type of soft tissue sarcoma, 1 Alpers-Huttenlocher syndrome Description Alpers-Huttenlocher syndrome is one of the most severe of a group of conditions called the POLG -related disorders. The conditions in this group feature a 1 Isolated Duane retraction syndrome Description Isolated Duane retraction syndrome is a disorder of eye movement. This condition toward the eartoward the ear toward the nosetoward the nose retractsr 1 Dyskeratosis congenita Description Dyskeratosis congenita is a disorder that can affect many parts of the body. There are three features that are characteristic of this disorder: fingernails and to 1 Early-onset isolated dystonia Description Early-onset isolated dystonia is one of many forms of dystonia, which is a group of muscle contractionsmuscle contractions tremorstremors other uncontrolle 1 EGFR gene epidermal growth factor receptor Normal Function The EGFR gene provides instructions for making a receptor protein called the epidermal growth factor receptor, which spans the cell memb 1 Ellis-van Creveld syndrome Description Ellis-van Creveld syndrome is an inherited disorder of bone growth that results in very dwarfismdwarfism lower legs and a narrow chest with short ribs. Ellis- 1 Autosomal dominant partial epilepsy with auditory features Description ADPEAFADPEAF form of epilepsy that runs in families. This disorder causes seizures usually auditoryauditory ringing. Some peop 1 X-linked severe combined immunodeficiency Description SCIDSCID immune system that occurs almost exclusively in males. Children with X-linked SCID are prone to recurrent and persistent infections be