Monohybrid and Dihybrid Flashcard

Front

What is a Punnett square?

Back

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

Front

Define homozygous.

Back

Having two identical alleles for a trait.

Front

What does heterozygous mean?

Back

Having two different alleles for a trait.

Front

What is the phenotype of an organism?

Back

The observable physical characteristics of an organism.

Front

What is the genotype of an organism?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present, while recessive alleles require two copies to express their trait.

Front

What is the phenotype for a homozygous dominant individual with free earlobes?

Back

Free earlobes.

Front

If a dog has the genotype Bb, what are its possible phenotypes?

Back

Brown fur (if B is brown) or red fur (if b is red).

Front

What is the expected genotype ratio from a monohybrid cross between two heterozygous parents?

Back

1:2:1 (1 homozygous dominant : 2 heterozygous : 1 homozygous recessive).

Front

What is the expected phenotype ratio from a dihybrid cross between two heterozygous parents?

Back

9:3:3:1.