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Lab Genetics

QuestionAnswer
Homozygous An organism that has two identical alleles for a trait. Ex. aa
Heterozygous An organism that has two different alleles for a trait. Ex. Aa
Punnett Square A chart that shows all the possible combinations of alleles that can result from a genetic cross.
Allele Different forms of a gene.
Dominant An allele that is always expressed.
Recessive An allele that is masked when a dominant allele is present.
Genotype Genetic makeup of an organism.
Phenotype Observable characteristics.
Multiple Alleles Three or more forms of a gene that code for a single trait.
Sex-Linked Inheritance Inheritance of a genetic trait located on the sex chromosomes (X or Y chromosomes).
Codominance A condition in which neither of two alleles of a gene is dominant or recessive (see a mix).
Incomplete Dominance Situation in which one allele is not completely dominant over another allele (blending).
Male Sex Chromosomes XY
Female Sex Chromosome XX
Created by: user-1832640
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