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 the letter 'Y' represent in genetics?

Back

'Y' represents the dominant allele for yellow seed pods.

Front

What does the letter 'y' represent in genetics?

Back

'y' represents the recessive allele for green seed pods.

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

What is the genotype of an organism?

Back

The genotype is the genetic constitution of an organism, specifically the alleles it possesses.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as 'YY' or 'yy'.

Front

What does heterozygous mean?

Back

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

Front

What is the probability of obtaining a homozygous recessive offspring from two heterozygous parents (Yy x Yy)?

Back

The probability is 25%.

Front

What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is a genetic trait that is expressed in the phenotype only when two copies of the allele are present.