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unit 3 vocab

unit 3 vocab for all lessons

heredity the passing of physical characteristics from parents to offspring
trait each specific characteristic
genetics the scientific study of heredity
fertilization the process when an egg and a sperm join together
purebred the offspring of many generations that have the same form of a trait
gene factors that control a trait
allele different forms of a gene
dominant allele one whose trait always shows up in the organism when the allele is present
recessive allele hidden when the dominant allele is present
hybrid has two different alleles for a trait
probability a number that describes how likely an event will occur
punnet square a chart that shows all the possible ways alleles can combine in a genetic cross
phenotype physical appearance or visible trait
genotype an organisms genetic make up or allele
homozygous an organism that has two identical alleles for a trait
heterozygous an organism that has two different alleles for a trait
incomplete dominance traits that result from a pattern of inheritance
codominance occurs when both alleles are expressed equally
multiple alleles it means that three or more possible alleles determine the trait
polygenic inheritance occurs when more than one gene affects the trait
meiosis the process by which the number of chromosomes is reduced by half sex cells form
Created by: jsnnelson