B2.7 Keywords 0.0 / 5 ? BiologyDNA and inheritanceGCSEAQA Created by: I BBCreated on: 03-06-16 17:00 DNA Deoxyribo nucleic acid, nuclei acid molecules that contain genetic information and make up chromosomes 1 of 15 Homozygous An individual who carries two copies of the same allele 2 of 15 Heterozygous An individual who carries two different copies of the allele 3 of 15 Genotype The combination of alleles an individual has for a particular gene 4 of 15 Phenotype The expression of the genotype 5 of 15 Recessive allele an allele that will only be expressed if there are two present; represented by a lower case letter 6 of 15 Dominant allele An allele that only needs to be present once in order to be expressed; represented by a capital letter 7 of 15 Allele An alternative form of a particular gene 8 of 15 Gene A section of DNA 9 of 15 Chromosome Long molecule found in the nucleus of all cells; made from DNA 10 of 15 Gametes Specialised sex cells formed by meiosis 11 of 15 Diploid cell A cell that contains two sets of chromosomes. 12 of 15 Haploid cell A sex cell (gamete) that contains one set of chromosomes 13 of 15 Diploid cell A cell that contains two sets of chromosomes. 14 of 15 Haploid cell A sex cell (gamete) that contains one set of chromosomes 15 of 15
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