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HEREDITY

Concept 2 & 3 Vocabulary

TermDefinition
Chromosome theory of inheritance Genes are located on chromosomes and the behavior of chromosomes during meiosis accounts for inheritance patterns
Epistasis When one gene overshadows all of the others.
Carrier someone who carries the recessive trait, but doesn't show it due to having a dominant X to mask it.
Mutation Any change in DNA (the order of nucleotide bases/letters)
Mutagen Chemicals that can cause DNA mutations (Ex. radiation, UV light, cigarette smoke)
Duplication Changes the size of chromosomes and results in multiple copies of a single gene
Translocation pieces of non-homologous chromosomes exchange segments (during crossing over)
Nondisjunction Chromosomes do not separate correctly during anaphase, resulting in 1 or 3 chromosomes rather than 2 per cell
Pedigree chart used to trace the phenotypes and genotypes in a family to determine whether people carry diseases or traits
Created by: Mrs.Coons
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