Theoretical Genetics 0.0 / 5 ? BiologyDNA and inheritanceIGCSEAQA Created by: amelia_hockenhullCreated on: 27-04-16 11:37 Define dominant An allele which is expressed in preference to another allele. 1 of 10 Define recessive An allele which is not expressed unless there are two copies of it. 2 of 10 Define homozygous Having 2 identical copies of the same allele for the same gene. 3 of 10 Define heterozygous Having 2 different copies of the same allele for the same gene. 4 of 10 Define codominance 2 different alleles which are both expressed. 5 of 10 Define genotype The 2 alleles present for a particular gene. 6 of 10 Define phenotype The physical result of 2 alleles. 7 of 10 Define transgenic The transfer of genetic material from 1 species to a different species. 8 of 10 What is the function of a DNA restriction enzyme? Cutting of DNA at specific sites. 9 of 10 What is the function of DNA ligase? The joining of DNA together. 10 of 10
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