Pedigree Chart For Free Or Attached Earlobes Answers

Pedigree Chart For Free Or Attached Earlobes Answers

The Basics of Pedigree Charts

Pedigree charts are a visual representation of a person’s family history, typically going back several generations. They are commonly used in genetics to track the inheritance of specific traits within a family. One such trait that can be tracked using a pedigree chart is the presence of free or attached earlobes. Free earlobes are those that hang down, while attached earlobes are connected to the side of the head. By studying a family’s pedigree chart, geneticists can determine the pattern of inheritance for earlobe shape and other traits.

Understanding the Inheritance of Earlobe Shape

The shape of a person’s earlobes is determined by a single gene with two alleles: one for free earlobes and one for attached earlobes. The allele for free earlobes (F) is dominant over the allele for attached earlobes (A). This means that if a person has at least one copy of the F allele, they will have free earlobes. If both copies of the gene are the A allele, the person will have attached earlobes. When looking at a pedigree chart, individuals with free earlobes will have at least one parent with free earlobes, while individuals with attached earlobes will have two parents with attached earlobes.

Using Pedigree Charts for Free or Attached Earlobes Answers

To determine the likelihood of a child having free or attached earlobes based on their parents’ earlobe shapes, geneticists can use a pedigree chart. By tracing the inheritance of earlobe shape through multiple generations, they can predict the probability of a child inheriting free or attached earlobes. Pedigree charts are a valuable tool in genetics for understanding the inheritance of traits and can provide answers to questions about specific traits like earlobe shape.