Punnett Square Practice

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 the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.

Front

What does 'phenotype' mean?

Back

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

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles for a trait (e.g., YY or yy), while heterozygous genotypes have two different alleles (e.g., Yy).

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present (e.g., Y in Yy).

Front

What does it mean if a trait is recessive?

Back

A recessive trait is only expressed in the phenotype when two copies of the allele are present (e.g., yy).

Front

How do you determine the probability of offspring traits using a Punnett Square?

Back

By filling out the Punnett Square with the parents' alleles, you can count the combinations to determine the probability of each genotype and phenotype.

Front

What is the expected phenotype ratio for a monohybrid cross?

Back

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

Front

What is the expected genotype ratio for a monohybrid cross?

Back

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

Front

If yellow flowers (Y) are dominant to white flowers (y), what is the phenotype of a plant with genotype Yy?

Back

The phenotype of a plant with genotype Yy is yellow flowers.