STUDY FOR GENETIC RELATION BETWEEN THE ATTACHED EAR LOBES AND HAIRY EARS IN A SELECTIVE IRAQI SAMPLE
English

AHMED SJ, YAAS NK
2013 International Journal of Medical and Clinical Research  
Introduction Some people have earlobes that curve up between the lowest point of the earlobe and the point where the ear joins the head; these are known as "free" or "unattached" earlobes. Other people have earlobes that blend in with the side of the head, known as "attached" or "adherent" earlobes [1]. Attached and free earlobes are often used to illustrate basic genetics. The myth is that earlobes can be divided into two clear categories, free and attached, and that a single gene controls the
more » ... trait, with the allele for free earlobes being dominant. Neither part of the myth is true [1,2] and there are many factors which influence ear lobe length for adult such as sex and age [3] . Classroom exercises on earlobe genetics say that there are two distinct categories, free (E) and attached (e). However, many of the papers on earlobe genetics have pointed out that there are many people with intermediate earlobes [4, 5] . El Kollali [6] classified earlobes into three types, based on whether the attachment angle was acute, right, or obtuse. In the present study, as in prior investigations, the men with phenotype attached earlobes and hairy ear have a genotype (karyotype of chromosomes) with translocation in the chromosome number 22, this result didn't have been previously reported.
doi:10.9735/0976-5530.4.2.261-262 fatcat:fz5fqlbwfrdbld7yjn53flnb3a