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Chapter 5

allele the different form of a trait that a gene may have
phenotype the way an organism looks or behaves
genotype an organism's genetic makeup
heredity passing of traits from parents to offspring
dominant a trait that can cover up another form of the trait
Punnett square a tool used to predict the probability of traits
recessive describes a trait that is covered over or hidden
genetics study of how traits are inherited through the action of alleles
polygenic inheritance occurs when a group of gene pairs acts together to produce a trait, such as human eye color
heterozygous describes an organism with different alleles for a trait (example: Tt); also called a hybrid
homozygous describes an organism with two alleles that are the same for a trait
hybrid an offspring that was given different genetic information for a trait from each parent
incomplete dominance production of a phenotype that is intermediate or a blend of two homozygous parents
genetic engineering biological and chemical methods to change the arrangement of a gene's DNA
sex-linked gene an allele inherited on a sex chromosome that can cause a disorder, such as color blindness
Created by: jrobertson1