WebThe presence of Darwin's tubercle (B) is dominant over the lack of a tubercle (b), and free-hanging earlobes (E) is dominant over attached earlobes (e). Sarah is heterozygous for Darwin's tubercle and earlobe attachment William is homozygous recessive for Darwin's tubercle and earlobe attachment. Darwin's tubercle (or auricular tubercle) is a congenital ear condition which often presents as a thickening on the helix at the junction of the upper and middle thirds. See more This atavistic feature is so called because its description was first published by Charles Darwin in the opening pages of The Descent of Man, and Selection in Relation to Sex, as evidence of a vestigial feature indicating … See more The feature is present in approximately 10.4% of the Spanish adult population, 40% of adults in India, and 58% of Swedish school children. This acuminate nodule represents the point of the mammalian ear. The trait can potentially be bilateral, meaning … See more The gene for Darwin's tubercle was once thought to be inherited in an autosomal dominant pattern with incomplete penetrance, meaning that those who possess the allele … See more • Human vestigiality See more
TIL - That point on your ear is called Darwin
WebOct 5, 2024 · Darwin’s tubercle (DT) is a congenital outer ear deformity characterized by a posterior thickening of the auricular helix. It is particularly common in certain ethnic groups, with reports ranging between 10% and 58% of the specific populations. Despite being common, this vestigial trait is poorly known. WebEssa característica atávica é assim denominada porque sua descrição foi publicada pela primeira vez por Charles Darwin nas páginas de abertura de A Descendência do … small flowers bedding
(PDF) Darwin’s Tubercle - ResearchGate
WebMedia in category "Darwin's tubercle" The following 6 files are in this category, out of 6 total. Darwin-s-tubercle.jpg 1,011 × 706; 200 KB. DarwinsTub.jpg 1,681 × 2,251; 706 KB. Descent of Man - Burt 1874 - Fig 2.png 819 × 1,337; 199 KB. Genome-wide associations of pinna traits.jpg 946 × 898; 163 KB. WebIn some ears a little prominence known as Darwin’s tubercle is seen along the upper, posterior portion of the helix; it is the vestige of the folded-over point of the ear of a remote human ancestor. The lobule, the fleshy lower part of the auricle, is the only area of the outer ear that contains no cartilage. Webhuman ear. In human ear: Outer ear. …a little prominence known as Darwin’s tubercle is seen along the upper, posterior portion of the helix; it is the vestige of the folded-over … songs from early 1900s