B1- Variation and Genes 0.0 / 5 ? BiologyVariation and reproductionGCSEOCR Created by: reubenwhiteCreated on: 09-01-17 17:26 DNA Molecules that carry genetic code that determines the characteristics of a living thing 1 of 10 Gene A short section of DNA 2 of 10 Chromosomes A long molecule mad up of DNA 3 of 10 Alleles Different forms of the same gene 4 of 10 Dominant Allele The characteristic controlled by a dominant allele develops if the allele is present on one or both chromosomes in a pair 5 of 10 Recessive Allele The characteristic controlled by a recessive allele develops only if the allele is present on both chromosomes in a pair 6 of 10 Heterozygous When the two alleles used to form a characteristic are different 7 of 10 Homozygous When the two alleles used to form a characteristic are the same 8 of 10 "F" Dominant Allele 9 of 10 "f" Recessive Allele 10 of 10
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