Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genotypes of a particular cross or breeding experiment, showing the possible combinations of alleles from the parents.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to an organism that has two identical dominant alleles for a trait (e.g., AA).

Front

What does heterozygous mean?

Back

Heterozygous refers to an organism that has two different alleles for a trait (e.g., Aa).

Front

What is the probability of an offspring having a specific trait?

Back

The probability is calculated by determining the ratio of the desired outcomes to the total possible outcomes in a genetic cross.

Front

What is the expected phenotypic ratio for a monohybrid cross?

Back

The expected phenotypic ratio for a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is the expected genotypic ratio for a monohybrid cross?

Back

The expected genotypic ratio for a monohybrid cross is typically 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive genotypes.

Front

How do you determine the chance of offspring having no belly fur?

Back

You analyze the Punnett Square results to find the proportion of offspring that have the genotype associated with no belly fur.

Front

What is the significance of the 25% probability in genetic crosses?

Back

A 25% probability indicates that there is a one in four chance of the offspring exhibiting a specific trait based on the genetic combinations.

Front

What is the role of dominant and recessive alleles in inheritance?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous individuals, determining the phenotype.

Front

What does it mean for a trait to be expressed in 100% of offspring?

Back

It means that all offspring will exhibit that trait due to the presence of at least one dominant allele in the parental genotypes.