Monohybrid and Dihybrid Crosses

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic cross between parents that differ in a single trait, focusing on the inheritance of one gene with two alleles.

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic cross between parents that differ in two traits, focusing on the inheritance of two genes, each with two alleles.

Front

What is the purpose of a Punnett square?

Back

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

Front

What does the term 'genotypic ratio' refer to?

Back

The genotypic ratio refers to the relative number of different genotypes produced in the offspring from a genetic cross.

Front

What is the genotypic ratio for a monohybrid cross?

Back

The genotypic ratio for a monohybrid cross is typically 1:2:1.

Front

What does the term 'phenotypic ratio' refer to?

Back

The phenotypic ratio refers to the relative number of different phenotypes produced in the offspring from a genetic cross.

Front

What is the phenotypic ratio for a monohybrid cross?

Back

The phenotypic ratio for a monohybrid cross is typically 3:1.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous individuals, determining the phenotype.

Front

What genotype would produce a recessive phenotype?

Back

A recessive phenotype is produced by a homozygous recessive genotype, such as 'hh'.

Front

How do you determine the phenotype from a genotype?

Back

The phenotype is determined by the expression of the genotype, influenced by dominant and recessive alleles.