AP Bio - Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genotypes of offspring from a genetic cross.

Front

What does the term 'genotype' mean?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present.

Front

What is the phenotypic ratio in a monohybrid cross?

Back

The phenotypic ratio in a monohybrid cross of two heterozygous parents is typically 3:1.

Front

What is the genotypic ratio in a monohybrid cross?

Back

The genotypic ratio in a monohybrid cross of two heterozygous parents is typically 1:2:1.

Front

How do you determine the probability of an offspring's genotype?

Back

The probability of an offspring's genotype can be determined using a Punnett Square.

Front

What is the significance of the F1 generation?

Back

The F1 generation is the first generation of offspring from a cross of two parental organisms.

Front

What does it mean for an allele to be 'codominant'?

Back

Codominant alleles are both expressed equally in the phenotype of a heterozygote.