Biology GCSE Inheritance Terminology 0.0 / 5 ? BiologyDNA and inheritanceGCSEAQA Created by: Rhys OwenCreated on: 11-04-13 13:14 Chromosome A unit of DNA which has 100s or 1000s of genes 1 of 9 Gene Part of a chromosome which controls a characteristic or trait 2 of 9 Allele When a specific gene has more than one form 3 of 9 Dominant Allele The allele of a gene that is always expressed in the phenotype of heterozygotes 4 of 9 Recessive allele The allele that is only expressed when two copies are present 5 of 9 Phenotype The observable characteristic or trait 6 of 9 Genotype Which alleles of a gene are present on a chromosome pair 7 of 9 Homozygous Where alleles of a gene are identical 8 of 9 Heterozygous Where alleles of a gene are different 9 of 9
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