Heredity Vocabulary

Front

What is the term for the physical appearance of an organism?

Back

Phenotype

Front

What is the term for the genetic makeup of an organism?

Back

Genotype

Front

What are the two types of alleles?

Back

Dominant and Recessive

Front

What does it mean if an allele is dominant?

Back

It means that the trait it represents will be expressed in the phenotype even if only one copy is present.

Front

What does it mean if an allele is recessive?

Back

It means that the trait it represents will only be expressed in the phenotype if two copies are present.

Front

What is the term for different forms of a gene?

Back

Alleles

Front

If a plant has the genotype Rr, what is its phenotype?

Back

Red flower (since R is dominant).

Front

If a plant has the genotype rr, what is its phenotype?

Back

White flower (since r is recessive).

Front

What is a homozygous genotype?

Back

A genotype with two identical alleles for a trait (e.g., AA or aa).

Front

What is a heterozygous genotype?

Back

A genotype with two different alleles for a trait (e.g., Aa).