2024 Genetics

Front

What is heredity?

Back

Heredity is the passing on of traits from parents to offspring through genes.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype that is a blend of the two.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous organism contribute to the phenotype, resulting in both traits being expressed.

Front

What are genotypes for red, white, and speckled carnations in codominance?

Back

Red = RR, White = WW, Speckled = RW.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a particular cross or breeding experiment, showing the possible genotypes of offspring.

Front

What is the expected phenotype ratio in a monohybrid cross?

Back

In a monohybrid cross, the expected phenotype ratio is typically 3:1 for dominant to recessive traits.

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that will appear in the phenotype even if only one allele is present.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that will only appear in the phenotype if two copies of the allele are present.

Front

What is the genotype for a plant with round peas that is heterozygous?

Back

The genotype for a heterozygous round pea plant is Rr.

Front

What is the expected fraction of offspring with a specific trait in a dihybrid cross?

Back

The expected fraction of offspring with a specific trait in a dihybrid cross can vary, but it is often 9:3:3:1 for the four possible phenotypes.