Suppose that two people having free earlobes start a family. Their first child has free earlobes and their sec- ond has attached earlobes.a. What are the genotypes of the parents? ________b. What is the genotype of their first child? ________c. What is the genotype of their second child? ________

3) Abraham is adopted. He has hair on the back of his hand (dominant trait). Could both of his parents have had hair on the back of their hand? __________________             Could both of his parents have had no hair on the back of their hand? Explain. ____________________________________________________________________________________________________________________________________

Explain how you can predict the sex-linked inheritance a son receives by looking at the mother's genotype.

In humans, the ability to roll the tongue is a dominant trait (R), while the inability to roll the tongue is recessive (r). Imagine two parents, both of which are heterozygous, decide to have a child. Create a Punnett square to determine what percentage of their children would be able to roll their tongues.

Use the information and the pedigree to answer the following questions. In monsters, the allele for having one eye is dominant (A). The allele for two eyes is recessive (a). The pedigree shows the occurrence of one eye and two eyes in four generations of a family. Label the generations and individuals Answer the following questions. 1. Which of these individuals in the pedigree is a male with the genotype aa? a. Individual 1-1 b. Individual II-2 C. Individual III-2 d. Individual III-5 2. Individuals III-6 and III-7 have two little monsters and are expecting a third one. Their two children have two eyes. What is the chance that the third child will have one eye? a. 25% b. 50% C. 75% d. 100% Show how you answered question 2 with a Punnett square. 3.