Punnett Squares

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

How many alleles does a child inherit from each parent?

Back

A child inherits 1 allele from each parent, making a total of 2 alleles for each gene.

Front

What blood type is considered the universal donor?

Back

Blood type O is considered the universal donor because it can be given to individuals of any blood type.

Front

What is the genotype of an individual with type AB blood?

Back

The genotype of an individual with type AB blood is AB, meaning they have one A allele and one B allele.

Front

If a child has type O blood, what are the possible genotypes of the parents?

Back

Both parents must have at least one O allele, so their genotypes could be OO, AO, or BO.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that only appears when an individual has two copies of the recessive allele (homozygous recessive).

Front

In a genetic cross, what does the term 'phenotype' refer to?

Back

Phenotype refers to the observable characteristics or traits of an individual, resulting from the interaction of their genotype with the environment.

Front

What is the purpose of a pedigree chart?

Back

A pedigree chart is used to track the inheritance of traits through generations in a family, helping to identify patterns of genetic disorders.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an individual (the alleles they carry), while phenotype refers to the physical expression of those genes.

Front

How can you determine if a trait is dominant or recessive using a Punnett Square?

Back

By crossing individuals with known genotypes and observing the phenotypes of the offspring, you can determine if a trait is dominant or recessive.