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

What does 'B' and 'b' represent in genetics?

Back

'B' represents the dominant allele for brown fur, while 'b' represents the recessive allele for white fur.

Front

What is the probability of getting a white fur offspring from a cross of Bb x Bb?

Back

50% probability for white fur (bb).

Front

What is a genotype?

Back

A genotype is an organism's genetic makeup, or allele combination, represented by letters (e.g., Bb, bb).

Front

What is a phenotype?

Back

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

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

A recessive allele is an allele that is masked by the presence of a dominant allele and only expresses its trait when two recessive alleles are present.

Front

In a Punnett Square, what does each box represent?

Back

Each box in a Punnett Square represents a possible genotype of the offspring resulting from the combination of alleles from the parents.

Front

What is the expected genotype ratio from a cross of Tt x Tt?

Back

1 TT : 2 Tt : 1 tt.

Front

What does 'codominance' mean in genetics?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.