Dihybrid Crosses

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic cross that examines the inheritance of two different traits, each controlled by different genes.

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the alleles it possesses (e.g., TT, Tt, tt).

Front

What are phenotypes?

Back

Phenotypes are the observable traits or characteristics of an organism, resulting from the interaction of its genotype with the environment.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a specific gene (e.g., Bb).

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a specific gene (e.g., BB or bb).

Front

What is the probability of obtaining a tall plant (T) from a dihybrid cross?

Back

The probability of obtaining a tall plant (T) is 75% when crossing two heterozygous tall plants (Tt x Tt).

Front

What is the expected phenotypic ratio in a dihybrid cross?

Back

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

Front

What is 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 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first generation of offspring obtained from a cross of two parental (P) organisms.