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Chapter 12

Study Guide

QuestionAnswer
Alleles Different version of gene for one trait, found at the same gene locus, result of mutation in existing gene over time
Allosome Mammals and many insect species have set of chromosomes that relate to development of sex organ and sex characteristic
Autosomes Rest of the chromosome in a cell (any chromosome that is not allosome)
Codominance Heterozygotes equally display both homozygous phenotypes at the same time
Dihybrid true breeding for 2 traits
Dominant if one copy is present it is the trait seen/expressed
Dominant lethal genetic variant that causes death of organism when present in single copy
Epistasis one gene mask or interferes with different gene
F1 (first filial - offspring of parents)
F2 (second filial - offspring of F1 cross)
Genotype specific alleles carried by an individual
Heterozygous different alleles for one gene
Homozygous same allele for a gene
Hybridization process of crossing two genetically different plants to produce new genotypes
Incomplete dominance two alleles mix for a 3rd expressed phenotype
Law of independent assortment just look at the slides bro...
P0 Initial parental generation (contrasting traits)
Phenotype resulting trait (physical expression) that the organism displays
Punnett square Method to organize and complete genetic crosses
Recessive is masked/hidden or not expressed/seen if the dominant allele is present
Recessive lethal genetic mutation cause the death of organism (I don't understand this)
Sex-linked gene carried only on either sex chromosome
Test Cross specific type of cross, done to determine the genotype of something with a dominant phenotype
Trait determined by protein made by genes
X-linked genes that are on the X or Y chromosome are (some gene are onlt on the X chromosome and some are only on the Y chromosome)
Created by: Khanlena
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