Dihybrid Punnett Squares

Front

What is a Dihybrid Punnett Square?

Back

A Dihybrid Punnett Square is a diagram used to predict the outcome of a genetic cross involving two traits, each represented by two alleles.

Front

What does the term 'phenotype' mean?

Back

Phenotype refers to the observable physical characteristics or traits of an organism, determined by its genotype and environmental influences.

Front

What does the term 'genotype' mean?

Back

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

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles for a trait (e.g., BB or bb), while heterozygous genotypes have two different alleles (e.g., Bb).

Front

If a parent has the genotype GgBb, what are the possible gametes they can produce?

Back

The possible gametes are GB, Gb, gB, and gb.

Front

What is the genotype of a homozygous dominant organism for a trait?

Back

The genotype of a homozygous dominant organism is represented as two uppercase letters (e.g., AA).

Front

What is the expected phenotypic ratio in a dihybrid cross?

Back

The expected phenotypic ratio in a dihybrid cross is 9:3:3:1.

Front

What is the significance of a Punnett Square in genetics?

Back

A Punnett Square helps visualize the possible genetic combinations from a cross and predict the probability of offspring inheriting specific traits.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.