S.7.2.3 Review - 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 a dominant allele represent?

Back

A dominant allele is a variant of a gene that will express its trait even when only one copy is present in the genotype.

Front

What does a recessive allele represent?

Back

A recessive allele is a variant of a gene that only expresses its trait when two copies are present in the genotype.

Front

If one parent has genotype Bb and the other has bb, what are the possible genotypes of the offspring?

Back

The possible genotypes are Bb and bb.

Front

What is the probability of getting a dominant trait from a Bb x bb cross?

Back

The probability is 50%.

Front

What is the phenotype of offspring from a cross of Bb x Bb?

Back

The phenotypes are 75% dominant trait and 25% recessive trait.

Front

What does phenotype refer to?

Back

Phenotype refers to the observable physical characteristics of an organism, determined by its genotype.

Front

What does genotype refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it carries.

Front

What is the significance of a 25% probability in a Punnett Square?

Back

A 25% probability indicates that there is a one in four chance of that specific genotype or phenotype occurring in the offspring.

Front

What is the difference between inherited and acquired traits?

Back

Inherited traits are passed down from parents to offspring through genes, while acquired traits are developed through environmental influences or experiences.