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Genetics

Lesson 1.1,1.2

TermDefinition
Allele one of two or more different versions of the same gene
Dominant allele allele that masks the presence of another allele for the same gene when they occur together in a heterozygote
Genetics the science of heredity
Genotype alleles an individual inherits at a particular genetic locus
Heterozygote organism that inherits two different alleles for a given gene
Homozygote organism that inherits two alleles of the same type for a given gene
Hybrid offspring that results from a cross between two different types of parents
Law of independent assortment Mendel’s second law stating that factors controlling different characteristics are inherited independently of each other
law of segretion Mendel's first law stating that the two factors controlling a characteristics separate and go to different gametes
locus position of a gene on a chromosome
phenotype characteristics of an organism that depend on how the organisms genotype is expressed
pollen tiny grains that bear the male gametes of seed plants and transfer sperm to female reproductive structure
pollination fertilization in plants in which pollen is transferred to female gametes in an ovary
recessive allele allele that is maked by the presence of another allele for the same gene when they occur together in a heterozygote
codominance relationship between two alleles for the same gate in which both alleles are expressed equally in phenotype of the heterozygote
incomplete dominance relationship between the alleles for a gene in which one allele is only partly dominant to the other allele so an intermediate phenotype result
polygenic characteristic characteristic,or trait,controlled by more than one gene,each of which may have two or more alleles
probability the likelihood,or chance,than a certain event will occur
punnett square chart for determining the expected percentages of different genotypes if the offspring of two parents
Created by: Alvarglo
 

 



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