Podcast
Questions and Answers
In a pedigree chart, what does a circle typically represent?
In a pedigree chart, what does a circle typically represent?
A female
What does a shaded shape in a pedigree usually indicate about an individual?
What does a shaded shape in a pedigree usually indicate about an individual?
They express a trait.
If a pedigree shows a horizontal line connecting a male and a female, what relationship does it represent?
If a pedigree shows a horizontal line connecting a male and a female, what relationship does it represent?
Marriage
In a pedigree, if parents with a dominant trait have a child that does not express the trait, what does this reveal about the parents' genotypes?
In a pedigree, if parents with a dominant trait have a child that does not express the trait, what does this reveal about the parents' genotypes?
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For a trait known to be dominant, how would individuals lacking the trait be genotypically classified?
For a trait known to be dominant, how would individuals lacking the trait be genotypically classified?
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Flashcards
Pedigree
Pedigree
A diagram that shows the inheritance of traits within a family.
Squares in a Pedigree
Squares in a Pedigree
In a pedigree, males are represented by squares.
Circles in a Pedigree
Circles in a Pedigree
In a pedigree, females are represented by circles.
Marriage in a Pedigree
Marriage in a Pedigree
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Parent-child connections in a Pedigree
Parent-child connections in a Pedigree
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Study Notes
Pedigrees
- A pedigree is a diagram showing the phenotype of multiple generations of a family.
- Squares represent males, circles represent females.
- If an individual has a trait, it is shaded.
- A horizontal line connecting a male and female represents marriage.
- Vertical lines and brackets connect parents to their children.
- Some pedigrees represent heterozygous people with shading half-filled.
- Geneticists know that a trait is dominant if all members of the family lacking the trait are homozygous recessive.
- If parents express the trait but at least one child does not, the parents must be heterozygous for the trait.
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Description
This quiz explores the fundamentals of pedigree analysis in genetics. Learn how to interpret diagrams that represent the phenotypes of family generations, understand the significance of different shapes, and the implications of shading in determining genetic traits. Discover how to identify dominant and recessive traits using pedigree charts.
