Unattached earlobes are dominant to attached earlobes. Cleft chin is dominant to no cleft. Parents that are heterozygous for both traits are crossed. Determine the ratio of offspring with the described trait to the total number of offspring:.

The proportion of offspring with detached earlobes and no cleft chin is 3:16. There is no cleft or dominating left chin. Let "C" stand for the allele that causes a cleft chin and "c" for the lack of a cleft chin.

What are the chances of having a child with free earlobes if two parents have attached earlobes?

When both of his or her parents have linked earlobes, perhaps one in every 100 persons will not. We are probably going to miss this if we focus on only a dozen people. Based on genetic dominance norms, we might argue that earlobe inheritance is straightforward and predictable.

Is earlobe separation a dominant trait?

The most typical type of ear lobe in humans are free lobes. This large and hanging below the place where it attaches to the head, this kind of earlobe is common. An allele that is dominant has an impact on this. The child will be born without earlobes if the dominant allele is expressed in the parents' DNA.

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