Punnett Square and Pedigree Review 2

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does genotype mean?

Back

Genotype refers to the genetic makeup of an individual, represented by the alleles they possess (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genotype and environment.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles are expressed in the phenotype even when only one copy is present, while recessive alleles are only expressed when two copies are present.

Front

How is a dominant allele represented?

Back

A dominant allele is represented by a capital letter (e.g., 'H' for Huntington's Disease).

Front

How is a recessive allele represented?

Back

A recessive allele is represented by a lowercase letter (e.g., 'h' for Huntington's Disease).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

Front

How many alleles does an individual inherit from each parent?

Back

An individual inherits one allele from each parent, totaling two alleles for each trait.

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.