1A. John and Mary Brown have dimples. Their daughter Suzy does not. Although John’s dad, Bob has dimples, his mother Abby does not, nor does his sister Grace. Mary’s dad Joe, her sister Tina and her brother Tony do not have dimples, but her mother Maria does.


1B. Based on this pedigree, are dimples dominant or recessive? How do you know?

1C. Use the letter “D” and identify the genotypes of each family member and place it in the table.