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.

Tags

NGSS.HS-LS3-1

Front

What does it mean if a disease is recessive?

Back

A recessive disease requires two copies of the mutated gene (one from each parent) for an individual to express the disease phenotype.

Front

What is the genotype of an individual with a recessive disease?

Back

The genotype of an individual with a recessive disease is 'rr', where 'r' represents the recessive allele.

Tags

NGSS.HS-LS1-1

Front

How do you calculate the probability of inheriting a recessive disease?

Back

To calculate the probability, use a Punnett square to determine the possible genotypes of offspring based on the parents' genotypes.

Tags

NGSS.HS-LS3-3

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 a carrier of a recessive disease?

Back

A carrier has one copy of the recessive allele (genotype 'Rr') but does not express the disease phenotype.

Tags

NGSS.HS-LS3-1

Front

How can you identify affected individuals in a pedigree?

Back

Affected individuals are typically represented by filled symbols (e.g., shaded circles or squares) in a pedigree chart.

Front

What is the role of the grandfather in a pedigree analysis?

Back

The grandfather's genotype can provide insight into the inheritance pattern and potential carriers in the family.

Tags

NGSS.HS-LS3-1

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an individual, while phenotype refers to the observable traits or characteristics.

Front

What does 'R' and 'r' represent in genetic notation?

Back

'R' represents the dominant allele, while 'r' represents the recessive allele.