VOCAB #4: Genetics and Heredity I

Front

What is a genotype in which the two alleles of a gene are the same?

Back

Homozygous

Front

What is the different form of a gene called?

Back

Allele

Front

What is a permanent change in the sequence of DNA, or the nucleotides, in a gene or a chromosome?

Back

Mutation

Front

How a trait appears or is expressed is known as what?

Back

Phenotype

Front

What is the study of how traits are passed from parents to offspring?

Back

Genetics

Front

What do we call the genetic makeup of an organism?

Back

Genotype

Front

What is the term for a trait that is expressed only when two recessive alleles are present?

Back

Recessive trait

Front

What is the term for a trait that is expressed when at least one dominant allele is present?

Back

Dominant trait

Front

What is the physical location of a gene on a chromosome called?

Back

Locus

Front

What is the term for organisms that have two different alleles for a particular gene?

Back

Heterozygous