Genetics Vocabulary Day 1

Front

What is a physical characteristic coded for by DNA?

Back

Trait

Front

How is the physical appearance of an organism described in words?

Back

Phenotype

Front

What are the different versions of a trait (gene) represented by letters called?

Back

Allele

Front

What term describes having two of the same alleles for a gene?

Back

Homozygous

Front

What term describes having two different alleles for a gene?

Back

Heterozygous

Front

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

Back

Genotype

Front

What is the observable expression of a trait in an organism?

Back

Phenotype

Front

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

Back

Dominant trait

Front

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

Back

Recessive trait

Front

What is the term for an organism that has two identical alleles for a specific trait?

Back

Homozygous