Punnett Square Practice

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 specific trait (e.g., AA or aa).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a specific trait (e.g., Aa).

Front

What is an allele?

Back

An allele is a variant form of a gene that determines a specific trait.

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 or biochemical characteristics of an organism, determined by its genotype.

Front

How many alleles does an offspring receive from each parent?

Back

An offspring receives one allele from each parent for a specific trait.

Front

What is the probability of homozygous offspring from two heterozygous parents (Aa x Aa)?

Back

The probability of homozygous offspring is 50% (AA or aa).

Front

What is the expected phenotype ratio from a monohybrid cross (Aa x Aa)?

Back

The expected phenotype ratio is 3:1 (3 dominant: 1 recessive).

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that is expressed in the phenotype even if only one allele is present.