Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genotype and phenotype combinations of a genetic cross.

Front

What does it mean for a trait to be dominant?

Back

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

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits or characteristics.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., RR or rr).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Rr).

Front

What is the expected phenotype ratio in a monohybrid cross of two heterozygous parents?

Back

The expected phenotype ratio is 3:1, with three exhibiting the dominant trait and one exhibiting the recessive trait.

Front

What is the expected genotype ratio in a monohybrid cross of two heterozygous parents?

Back

The expected genotype ratio is 1:2:1, with one homozygous dominant, two heterozygous, and one homozygous recessive.

Front

What is a recessive trait?

Back

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

Front

How do you determine the genotype of a red-flowering plant if red (R) is dominant over white (r)?

Back

The genotype can be either homozygous dominant (RR) or heterozygous (Rr).

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first filial generation, resulting from a cross between two parental (P) generation organisms.