Heredity and Genetics

Front

What is the term for an organism with two identical alleles for a trait?

Back

Homozygous

Front

What is the term for an organism with two different alleles for a trait?

Back

Heterozygous

Front

What are different forms of a gene called?

Back

Alleles

Front

What is the allele combination of an organism represented by uppercase and lowercase letters?

Back

Genotype

Front

What is a section of DNA that determines the trait of an organism?

Back

Gene

Front

What is the observable physical characteristic of an organism?

Back

Phenotype

Front

What is the genetic makeup of an organism?

Back

Genotype

Front

What do we call a trait that is expressed only when two recessive alleles are present?

Back

Recessive trait

Front

What do we call a trait that is expressed when at least one dominant allele is present?

Back

Dominant trait

Front

What is the probability of obtaining a homozygous recessive offspring from two heterozygous parents?

Back

25% (1 in 4)