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genetics

chapter 1

TermDefinition
Allele Different versions of a gene
Dominant allele An allele that is expressed when present.
Genetics The science of heredity.
Genotype The genetics makeup of an organism.
Heterozygote An organism with two different alleles.
Homozygote An organism with two alleles of the same type.
Hybrid Offspring produced from parents with different traits.
Law of independent assortment Genes for different traits are inherited independently of each other.
Law of segregation Two alleles for a trait separate during gamete formation.
Locus The location of a gene on a chromosome.
Phenotype The observable traits of an organism.
Pollen Tiny grains that are the male gametes of plants.
Pollination Is the fertilization step in the sexual reproduction of plants.
Recessive allele The allele that isn’t expressed.
Codominance Both alleles are fully expressed in the phenotype of a heterozygote.
Incomplete dominance When the dominant allele is not completely dominant.
Polygenic characteristic A trait controlled by two or more genes
Probability The chance that something will happen.
Punnett square A chart that allows you to easily determine the genotypes in the offspring of two parents.
Created by: user-1980457
 

 



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