Pedigree Analysis
Biology ⇒ Genetics and Heredity
Pedigree Analysis starts at 10 and continues till grade 12.
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A pedigree shows a trait that appears only in males and is passed from father to all sons. What is the most likely mode of inheritance?
A pedigree shows a trait that skips generations and affects both males and females equally. What is the most likely mode of inheritance?
A pedigree shows that a trait is present in every generation and both males and females are equally affected. What is the most likely mode of inheritance?
Describe how you would distinguish between autosomal dominant and autosomal recessive inheritance using a pedigree.
A pedigree shows a trait that appears only in males and is passed from father to all sons. What is the most likely mode of inheritance?
A pedigree shows a trait that skips generations and affects both males and females equally. What is the most likely mode of inheritance?
A pedigree shows that a trait is present in every generation and both males and females are equally affected. What is the most likely mode of inheritance?
If a man with an X-linked recessive disorder marries a woman who is a carrier, what is the probability that their daughter will be affected?
In a pedigree, a shaded symbol usually indicates: (1) An affected individual (2) A carrier (3) An unaffected individual (4) A deceased individual
Which of the following inheritance patterns is characterized by the trait appearing in every generation? (1) Autosomal dominant (2) Autosomal recessive (3) X-linked recessive (4) Mitochondrial
Which of the following is a key feature of mitochondrial inheritance? (1) Only males are affected (2) Only females are affected (3) Both sexes are affected, but only mothers transmit the trait (4) Both sexes are affected, but only fathers transmit the trait
Which of the following is a limitation of pedigree analysis? (1) It cannot detect new mutations (2) It can only be used for dominant traits (3) It is only useful for small families (4) It cannot identify carriers
Fill in the blank: In a pedigree, a diamond symbol is used when the sex of the individual is ______.
Fill in the blank: In a pedigree, a symbol with a diagonal line through it represents a(n) ______ individual.
Fill in the blank: In a pedigree, siblings are connected by a ______ line.
Fill in the blank: The vertical line connecting parents to their children in a pedigree is called a ______ line.
True or False: In a pedigree, a horizontal line connecting a square and a circle represents a mating.
True or False: In a pedigree, identical twins are represented by a horizontal line connecting their symbols and a vertical line splitting into two branches.
True or False: In autosomal dominant inheritance, two unaffected parents can have an affected child.
True or False: In autosomal recessive inheritance, affected individuals can have parents who are both unaffected.
