Unit 3 Review: Meiosis, Mutations, and Heredity

Front

What is the outward expression of a genetic trait called?

Back

Phenotype

Front

What do we call an organism with two identical genes for a trait?

Back

Homozygous for the trait

Front

In a pedigree chart, what do circles represent?

Back

Female

Front

What is the process that allows for genetic variation during meiosis?

Back

Crossing over

Front

What is the genotype Aa referred to as?

Back

Hybrid

Front

What is the term for different forms of a gene?

Back

Alleles

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

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

Back

Homozygous recessive

Front

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

Back

Homozygous dominant

Front

What is the process by which mutations can occur?

Back

Changes in DNA sequence