Dihybrids

Front

What is a dihybrid cross?

Back

A genetic cross that examines the inheritance of two different traits, each represented by two alleles.

Front

Define homozygous recessive genotype.

Back

A genotype consisting of two identical recessive alleles (e.g., 'tt').

Front

Define heterozygous genotype.

Back

A genotype consisting of one dominant and one recessive allele (e.g., 'Bb').

Front

What is Mendel's Law of Segregation?

Back

The principle stating that during the formation of gametes, the two alleles for a trait segregate from each other.

Front

What is Mendel's Law of Independent Assortment?

Back

The passing of allele of one trait does not affect the passing of allele of another trait.

Front

What is a phenotype?

Back

The physical trait that is expressed as a result of the genotype.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Front

What is the expected phenotypic ratio in a dihybrid cross?

Back

9:3:3:1 ratio of phenotypes.

Front

What does a Punnett square illustrate?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What is the probability of obtaining a homozygous dominant offspring from a dihybrid cross?

Back

The probability depends on the specific alleles involved, but typically it is 1/16 for a dihybrid cross.