Punnett Square Practice

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 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 a phenotype?

Back

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

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, represented by the alleles it possesses.

Front

What is the probability of offspring being heterozygous from a cross between homozygous dominant and homozygous recessive?

Back

100%.

Front

If a plant with genotype Pp is crossed with a plant with genotype pp, what is the probability of the offspring being homozygous recessive?

Back

50%.

Front

In a genetic cross, what does the letter 'B' represent if 'B' is brown eyes and 'b' is blue eyes?

Back

'B' represents the dominant allele for brown eyes.

Front

In a genetic cross, what does the letter 'b' represent if 'B' is brown eyes and 'b' is blue eyes?

Back

'b' represents the recessive allele for blue eyes.

Front

What is the expected phenotype ratio for a cross between Bb and bb?

Back

50% brown eyes and 50% blue eyes.