Pedigree analysis practice problems with solutions.

🧬 Topic Summary

Pedigree analysis is a visual tool used to trace the inheritance of traits over multiple generations. By analyzing the symbols representing individuals and their relationships, we can determine the mode of inheritance (dominant, recessive, X-linked) and predict the probability of future offspring inheriting specific traits. It's like reading a family tree, but for genes! 🌳 It helps us understand how genetic conditions are passed down in families.

🔑 Part A: Vocabulary

Match the term to its correct definition:

1. Term: Autosomal
2. Term: Recessive
3. Term: Phenotype
4. Term: Genotype
5. Term: X-linked

1. Definition: The genetic makeup of an individual.
2. Definition: A trait located on a non-sex chromosome.
3. Definition: A trait expressed only when two copies of the allele are present.
4. Definition: Located on the X chromosome.
5. Definition: The observable characteristics of an individual.

(Match the numbers to the letters.)

✍️ Part B: Fill in the Blanks

In pedigree analysis, a _______ shape typically represents a male, while a _______ shape represents a female. Shaded shapes indicate individuals _______ the trait, while unshaded shapes indicate individuals _______ the trait. A horizontal line connecting a male and female indicates a _______.

🤔 Part C: Critical Thinking

A pedigree shows a trait appearing in every generation. Would you hypothesize that the trait is likely dominant or recessive? Explain your reasoning.