Monohybrid Crosses (complete dominance)

Front

What is the term for having two of the same genes for a trait?

Back

Homozygous

Front

What do we call alleles that are represented by capital letters?

Back

Dominant alleles

Front

Which genotype represents a homozygous recessive condition?

Back

tt

Front

What do we call alleles that are represented by lowercase letters?

Back

Recessive alleles

Front

What is an example of a phenotype?

Back

Blue eyes

Front

What is the term for the physical expression of a trait?

Back

Phenotype

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

In a monohybrid cross, what ratio is expected in the phenotypes of the offspring?

Back

3:1 ratio of dominant to recessive phenotypes

Front

What is the purpose of a Punnett square in genetics?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross

Front

What does it mean if an organism is heterozygous for a trait?

Back

It has two different alleles for that trait (e.g., Aa).