are dimples a common trait
Cheek dimples: The myth. When some people smile, they have dimples in one or both cheeks. Other people don't have dimples. This is occasionally said to be a simple genetic trait; the myth is that dimples are controlled by one gene with two alleles, and the allele for dimples is dominant. The chin or the mental region is the area of the face below the lower lip and including the mandibular prominence. It is formed by the lower front of the mandible. In humans there is a wide variety of chin structures, e.g. cleft chin. In human evolution, the chin is a cladistic apomorphy, partially defining anatomically modern humans as distinct from archaic forms. With dominant phenotype, you may have a dimple on one side, or both. Dominant (have it) ___. Recessive (don't have it) ___. 6. Eye Color: Eye color, as well as hair and skin, is a complex trait; not a case of simple inheritance. The main pigment is melanin, and the more melanin, the darker the color. Although the genetics of eye color is complex, alleles for production of melanin dominate those for lack of melanin. Cheek dimples as a character. Dimples vary in how obvious they are. Wiedemann (1990) suggests that their appearance may be affected by circulation, body weight or muscle tone, although he does not cite any evidence for this. He describes several individuals who had dimples as children and lost them by adulthood. The terms cleft chin, chin cleft, dimple chin, or chin dimple, refer to a dimple on the chin. It is a Y-shaped fissure on the chin with an underlying bony peculiarity. The characteristics that an organism inherits from its parents are called traits. In humans, traits include such things as the color of a person's hair, skin, and eyes, the blood group, the shape of nose and lips, and the tendancy to be short-sighted or to become bald. Some of the traits that humans acquire through inheritance can be modified by the influence of the environment, while others cannot. The information on this page fits well with BIODIVERSITY in Grade 9. Are some human traits (dominant? or recessive?) more prevalent in your community than in other communities? The information helps students to identify traits common to a particular community . This is an inherited trait in humans, where the dominant gene causes the cleft chin, while the recessive genotype presents without a cleft. However, it is also a classic example for variable penetrance with environmental factors or a modifier gene possibly affecting the phenotypical expression of the actual genotype. Cheek dimples. When some people smile, they have dimples in one or both cheeks. Other people don't have dimples. This is occasionally said to be a simple genetic trait; the myth is that dimples are controlled by one gene with two alleles, and the allele for dimples is dominant. Dimples - Genetic Trait. Dimples can be present on both cheeks or one, and some people have them on their chin. Like all physical traits that you possess you have two genes for them. One inherited from your father and one from your mother. The way that a physical trait is expressed, and hence the way you look is a result of either a combination of dominant genes, a dominant and a recessive gene or two recessive genes.
Yes,It is occasionally said to be a simple genetic trait.