Autosomal Traits: Complete these exercises with a partner of the opposite sex. 12. Can you roll your tongue? ges Yes or No - Partner At No Partner B: Tongue rolling is a Dominant trait. If you can roll your tongue, assume you are heterozygous (Rt). If you cannot roll your tongue, you are homozygous receive for this trait (tr). Complete the Punnett Square below and calculate the percentage probability of inheritance: IRr Rr Probability (percentage) of having Tongue-rolling child? 50% Non tongue-rolling child? 50 rr 13. Earlobes attached entirely to the head or not: Yes or No = Partner A: Partner B: Attached earlobe is a recessive trait. If you have attached earlobes, you are homozygous recessive for this trait (ee). If you have free-hanging earlobes, assume you are homozygous dominant for this trait (EE). Complete the Punnett Square below and calculate the percentage probability of inheritance: Probability (percentage) of having % Attached carlobe child? % Free-hanging earlobe child? 14. Do you have hair on your middle phalange? Yes or No = Partner A Partner B Mid-digital hair is a Dominant trait. Look at the middle segments of all of your fingers. Note the presence or absence of hair. For the purposes of this exercise, if you have any hair on the middle segment of any of your fingers, assume you are heterozygous for this trait (Hh). Complete absence of hair indicates a homozygous recessive genotype for this trait (hh). Complete the Punnett Square below and calculate the percentage probability of inheritance: Probability (percentage) of having Child with finger hair? Child without finger hair?