Genetics Quiz

What is an allele?

• A trait that is expressed only when genotype is homozygous

• One of two or more alternative forms of a gene that arise by mutation

• The set of observable characteristics of an individual

• A cross between two organisms with different variations at one genetic locus of interest

What does the term "genotype" refer to?

• The physical appearance of an organism

• The genetic constitution of an individual organism

• A characteristic influenced by genes on the sex chromosomes

• A cross between two organisms with different variations at one genetic locus of interest

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

What is the definition of homozygous?

What is incomplete dominance?

What is a monohybrid cross?

What is a phenotype?

What does "polygenic" mean?

What is the definition of recessive?

What is a sex-linked trait?