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A downward gradient of dry ear wax allele phenotypes can be drawn from northern China to southern Asia and an east–west gradient can also be drawn from eastern Siberia to western Europe. The allele frequencies within ethnicities continued to be maintained because the ABCC11 gene is inherited as a haplotype , a group of genes or alleles that ...
Earwax protects the skin of the human ear canal, assists in cleaning and lubrication, and provides protection against bacteria, fungi, particulate matter, and water. [1] Major components of earwax include cerumen, produced by a type of modified sweat gland, and sebum, an oily substance. Both components are made by glands located in the outer [2 ...
There is a genetic component that determines whether you have more wet and sticky earwax versus dry and flakey earwax. In 2006, Japanese researchers were able to determine that a single DNA unit ...
OMIM (Online Mendelian Inheritance in Man) [3] is a comprehensive database of human genotype–phenotype links. Many visible human traits that exhibit high heritability were included in the older McKusick's Mendelian Inheritance in Man. Before the discovery of genotyping, they were used as genetic markers in medicolegal practice, including in ...
Patulous Eustachian tube is the name of a physical disorder where the Eustachian tube, which is normally closed, instead stays intermittently open. When this occurs, the person experiences autophony, the hearing of self-generated sounds. [1] These sounds, such as one's own breathing, voice, and heartbeat, vibrate directly onto the ear drum and ...
A cerumenolytic is an ear wax ( cerumen) softening agent. Common cerumenolytics such as hydrogen peroxide and hydrogen peroxide - urea (also called carbamide peroxide) are topical preparations used to facilitate the removal of ear wax. Their side effects tend to be mild, including ear discomfort, transient loss of hearing, dizziness, and local ...
Tympanic membrane retraction. Tympanic membrane retraction describes a condition in which a part of the eardrum lies deeper within the ear than its normal position. The eardrum comprises two parts: the pars tensa, which is the main part of the eardrum, and the pars flaccida, which is a smaller part of the eardrum located above the pars tensa.
Specialty. Medical genetics. Maple syrup urine disease ( MSUD) is an autosomal recessive [1] metabolic disorder affecting branched-chain amino acids. It is one type of organic acidemia. [2] The condition gets its name from the distinctive sweet odor of affected infants' urine and earwax, particularly prior to diagnosis and during times of acute ...
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