Meiosis and Variation Definitions 3.0 / 5 based on 1 rating ? BiologyCellular processes and structureA2/A-levelOCR Created by: ImogenCreated on: 10-06-13 12:52 Allele An allele is a version of a gene 1 of 8 Locus The locus is the position of a specific gene on a chromosome 2 of 8 Phenotype The phenotype is the observable characteristics of an organism 3 of 8 Genotype Genotype describes the particular alleles present on a chromosome for a specific trait/characteristic 4 of 8 Dominant Dominant describes a characteristic which will be displayed in the phenotype when only one allele is present 5 of 8 Codominant Codominant describes a characteristic where both alleles contribute to the phenotype 6 of 8 Linkage Different alleles for different characteristics which are present at different loci on the same chromosomes are linked 7 of 8 Crossing Over Crossing Over occurs when non-sister chromatids exchange genetic information in Prophase I of meiosis 8 of 8
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