Punnet Square Flashcard

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 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 a brown-eyed person with one brown allele and one blue allele?

Back

The genotype is Bb.

Front

If a brown-eyed (Bb) and a blue-eyed (bb) parent have a child, what is the chance the child will have blue eyes?

Back

50% chance.

Front

What is the phenotype of an organism?

Back

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

Front

What is the significance of the X and Y chromosomes?

Back

The X and Y chromosomes determine the sex of an individual; males have one X and one Y chromosome (XY), while females have two X chromosomes (XX).

Front

In a genetic cross, what does the term 'F1 generation' refer to?

Back

The F1 generation refers to the first generation of offspring resulting from a cross between two parental lines.

Front

What is the expected phenotypic ratio of a monohybrid cross?

Back

The expected phenotypic ratio of a monohybrid cross is typically 3:1 for dominant to recessive traits.