Alexis Smith - Simple Pedigree Practice

Simple Pedigree Practice 1. Label the following pedigrees if the trait is dominant or recessive and explain how you can tell. 2. Being an albino is a recessive disorder affecting humans. If someone has this disorder, they cannot produce skin pigment and have the genotype aa. The pedigree below shows people that are albinos. On the pedigree, label each person’s genotype. If a dominant person’s genotype is unknown, mark it with A? since the second allele is unknown.

Aa Aa Ol O B O The original parents in this pedigree must be what genotype? Explain how you know the answer to the above question How many people are albinos in this pedigree? How many kids do the original parents have? 3. The pedigree below shows individuals with Achondroplasia, a form of dwarfism. On the pedigree, label each person’s genotype. If a dominant person’s genotype is unknown, mark it with A? since the second allele is unknown. e © l | =