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ELL Biology Ch 5

Heredity and Genetics

TermDefinition
trait an inherited characteristic
heredity the passing of traits from parents to offspring
genetics the study of heredity
gene a factor that controls inherited traits
dominant describes a gene or trait that will always show itself
recessive describes a gene or trait that will be hidden when the dominant gene or trait is present
homozygous having two like genes for the same trait
heterozygous having two unlike genes for the same trait
genotype the gene combination for a given trait in an organism
phenotype the appearance of a trait in an organism
Punnett Square a chart that shows possible gene combinations
DNA the large molecules in a cell that store genetic information
RNA a molecule in a cell used in the making of proteins
pedigree a chart that shows how a certain trait is passed from generation to generation
mutation a change in a gene
genetic engineering the methods used to change the genetic information in the DNA of cells or organisms
Created by: Jesse Wayland