Flashcard - Monohybrid & Dihybrid

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic mix between two individuals with different alleles for a single gene, focusing on one trait.

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic mix between two individuals that differ in two traits, examining the inheritance of two different genes.

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio in a monohybrid cross is 3:1.

Front

What is the expected genotypic ratio in a monohybrid cross?

Back

The expected genotypic ratio in a monohybrid cross is 1:2:1.

Front

Define dominant allele.

Back

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

Front

Define recessive allele.

Back

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

Front

What does a Punnett square illustrate?

Back

A Punnett square illustrates the possible genetic combinations from a cross between two parents.

Front

What is the purpose of a test cross?

Back

A test cross is used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.

Front

What is the phenotypic ratio in a dihybrid cross?

Back

The expected phenotypic ratio in a dihybrid cross is 9:3:3:1.

Front

What is the significance of the F1 generation?

Back

The F1 generation is the first filial generation, produced from a cross of the parental generation, and typically exhibits the dominant trait.