A couple with the ability to taste PTC have two grown sons and one grown daughter. The sons have the ability to taste PTC. Their daughter is a PTC non-taster. She married a PTC non-taster man, and they have two sons. Draw a pedigree in the box on the right that fully represents the above scenario and tracks the inability to taste PTC (non-taster), which is caused by two recessive âtâ alleles. In your illustrated pedigree, please make sure that: (A) generations are listed as Roman numerals and the individuals are numbered. (B) the correct shapes for males and females are used. (C) the shapes the require shading are shaded. (D) the genotypes are listed next to each pedigree shape.
