Pedigree POGIL

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 a square represent in a pedigree chart?

Back

A square represents a male individual.

Front

What does a circle represent in a pedigree chart?

Back

A circle represents a female individual.

Front

What is the significance of a marriage line in a pedigree chart?

Back

A marriage line connects two individuals who are married or in a partnership, indicating their relationship.

Front

What does it mean if an individual is represented by a shaded shape in a pedigree chart?

Back

A shaded shape indicates that the individual expresses the trait being studied, often a genetic disorder.

Front

What is the probability of offspring being homozygous recessive (aa) if both parents are heterozygous (Aa)?

Back

There is a 25% chance of the offspring being homozygous recessive (aa).

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What does it mean for an allele to be recessive?

Back

A recessive allele is one that is masked by the presence of a dominant allele and only expresses its trait when two copies are present (homozygous recessive).

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a particular gene (e.g., AA or aa), while heterozygous means having two different alleles (e.g., Aa).