Abstract:
It is known that, there are two types of human ear lobes. free earlobes (unattached) which is dominant trait (E-) and attached earlobes that is recessive trait.There is limited studies on the frequency of these types among libyain population. The main goal of this study was to determine the human inheritance trait for earlobes and to see whether there is an effect for gender in this inheritance trait study . A samples of 1389 (679 male and710 female) from students were involved. Results showed that the frequency of unattached type earlobe was 69.4%. and attached was 30.6 %. Both sexes in the population have higher frequency of unattached (65.5% in male and 73.1% in females) there was Statistically nonsignificant in female. ( P value lower than0.05, Chi-Square value of 23.2 ) was calculated where the null hypothesis was rejected . The states that normal distribution for Mendel are data on the basis of 3:1 ratio and this could be related to male Chi-square effect. In conclusion, the unattached earlobes is the most commonly type which is the dominant, in Libyan population. .This suggesting more studies are necessary including large sample size and observing further associated attribute to ear lobes such as blood groups that were needed.
