Pedigree Analysis
Biology ⇒ Genetics and Heredity
Pedigree Analysis starts at 10 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Pedigree Analysis.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
A pedigree shows a trait that affects both males and females equally and appears in every generation. What is the most likely mode of inheritance?
A pedigree shows a trait that only appears in males and is passed from father to all sons. What is the most likely mode of inheritance?
Describe how you would distinguish between autosomal dominant and autosomal recessive inheritance using a pedigree.
Describe how you would identify an X-linked recessive trait in a pedigree.
Describe the main difference between a carrier and an affected individual in a pedigree.
Explain why consanguineous marriages increase the risk of autosomal recessive disorders in offspring.
Explain why mitochondrial inheritance only occurs through the maternal line.
Explain why X-linked dominant traits are more common in females than in males.
If a mother is a carrier for an X-linked recessive trait and the father is unaffected, what is the probability that their son will be affected?
If a pedigree shows that all daughters of an affected father are affected, but none of his sons are, what is the likely mode of inheritance?
If a trait is only passed from mothers to all their children, what type of inheritance is this?
If a trait skips generations in a pedigree, what type of inheritance is most likely?
If both parents are carriers for an autosomal recessive disorder, what is the probability that their child will be affected?
In a pedigree, what does a double horizontal line between two individuals indicate?
In a pedigree, what does a horizontal line connecting a male and a female represent?
What is a pedigree chart used for in genetics?
Which inheritance pattern is suggested if a trait appears in every generation of a pedigree?
A couple, both heterozygous for an autosomal recessive disorder, have three children. What is the probability that at least one child will be affected?
A pedigree shows that a rare trait is present in a father and all his sons, but none of his daughters. What is the most likely mode of inheritance?
Describe the steps you would take to determine whether a trait is inherited in a Mendelian fashion using pedigree analysis.
