LIFSCI 7B XL - Simulation: Pedigree
Questions and Answers 100% Pass
What is the purpose of using a pedigree in genetic studies?
Pedigrees help trace the inheritance patterns of specific traits or genetic conditions through
family generations.
How can you determine if a trait is autosomal ...
LIFSCI 7B XL - Simulation: Pedigree
Questions and Answers 100% Pass
What is the purpose of using a pedigree in genetic studies?
✔✔ Pedigrees help trace the inheritance patterns of specific traits or genetic conditions through
family generations.
How can you determine if a trait is autosomal dominant from a pedigree?
✔✔ An autosomal dominant trait typically appears in every generation, and affected individuals
usually have at least one affected parent.
What is a characteristic feature of an autosomal recessive trait in a pedigree?
✔✔ Autosomal recessive traits often skip generations, and affected individuals can be born to
unaffected parents who are carriers.
How can you distinguish a sex-linked recessive trait in a pedigree?
✔✔ Sex-linked recessive traits are more common in males than females, and affected males
usually inherit the trait from their carrier mothers.
1
, Why is it more challenging to identify carriers of autosomal recessive traits from a pedigree?
✔✔ Carriers do not show symptoms of the trait, so their presence is often hidden unless genetic
testing or multiple affected offspring are observed.
What does it mean when a pedigree shows both males and females equally affected by a trait?
✔✔ This typically suggests that the trait is autosomal, rather than sex-linked, because it affects
both genders equally.
How can you infer if a trait is sex-linked dominant based on a pedigree?
✔✔ In sex-linked dominant inheritance, affected fathers pass the trait to all of their daughters but
none of their sons, while affected mothers can pass the trait to both sons and daughters.
What can you conclude if a trait appears only in males in a pedigree?
✔✔ This may indicate a Y-linked trait, which is passed from father to son and affects only
males.
Why might a pedigree be useful in predicting the risk of inheriting a genetic disorder?
✔✔ Pedigrees allow for the identification of inheritance patterns, which can help predict the
likelihood of passing on genetic conditions to future generations.
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