AJH Pedigree Review 2

Front

What is a pedigree chart?

Back

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors, used to analyze the inheritance of traits.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that only appears in an individual if both alleles for that trait are recessive. If an individual has one dominant allele, the dominant trait will be expressed.

Tags

NGSS.HS-LS3-1

Front

How can you determine the genotype of an individual in a pedigree?

Back

You can determine the genotype by analyzing the phenotypes of the individual and their relatives, considering the inheritance patterns of the traits.

Front

What is the significance of generation numbers in a pedigree?

Back

Generation numbers indicate the lineage and help track the inheritance of traits through different generations.

Front

What does it mean if an individual is unaffected in a pedigree?

Back

An unaffected individual does not express the trait being studied, which may indicate they have at least one dominant allele for a dominant trait or are homozygous for a recessive trait.

Tags

NGSS.HS-LS3-2

Front

How do you identify carriers in a pedigree?

Back

Carriers are individuals who have one recessive allele for a trait but do not express the trait themselves. They can be identified if they have affected offspring.

Front

What is the role of symbols in a pedigree chart?

Back

Symbols in a pedigree chart represent individuals and their relationships. Squares typically represent males, circles represent females, and shading indicates affected individuals.

Front

What does it mean if two individuals in a pedigree are connected by a horizontal line?

Back

A horizontal line between two individuals indicates a mating relationship, typically representing a couple.

Front

How can you tell how many children a couple has in a pedigree?

Back

The number of vertical lines stemming from a horizontal line connecting a couple indicates the number of children they have.

Front

What is the purpose of analyzing a pedigree?

Back

Analyzing a pedigree helps to understand the inheritance patterns of traits, identify carriers, and predict the likelihood of traits appearing in future generations.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2