Dihybrid Punnett Squares

Front

What are the possible gametes from a parent with genotype GgBb?

Back

GB, Gb, gB, gb

Front

What is the genotype of a heterozygous green watermelon?

Back

Gg

Front

What does homozygous recessive mean?

Back

An organism with two identical recessive alleles for a trait (e.g., gg).

Front

What fraction of offspring will have wrinkled, yellow seeds in a dihybrid cross resulting in 3/16?

Back

3/16

Front

What percentage of offspring from a BbTt x BBtt cross will have black fur and long tails?

Back

50%.

Front

Define dihybrid cross.

Back

A genetic cross between individuals that differ in two traits.

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross.

Front

What does it mean for an allele to be dominant?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is the phenotype of a plant with genotype Gg?

Back

Green, since G (green) is dominant over g (striped).

Front

What is the difference between genotype and phenotype?

Back

Genotype is the genetic makeup (e.g., Gg), while phenotype is the observable trait (e.g., green color).