Punnett Squares

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic makeup of offspring from two parents based on their alleles.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as BB or bb.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Bb.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

What is the genotype of an organism?

Back

The genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is the phenotype of an organism?

Back

The phenotype is the observable physical characteristics of an organism, determined by its genotype.

Front

If a plant has the genotype Tt, what is its phenotype if T is dominant?

Back

The phenotype of the plant will be tall, as the dominant allele T masks the effect of the recessive allele t.

Front

What is the purpose of using a Punnett square?

Back

The purpose of using a Punnett square is to visualize and calculate the probability of different genotypes and phenotypes in offspring.

Front

What is an allele?

Back

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

Front

If a parent has the genotype Aa, what are the possible alleles it can pass to its offspring?

Back

The parent can pass either the A allele or the a allele to its offspring.