B1 you and your genes 0.0 / 5 ? BiologyDNA and inheritanceGCSEOCR Created by: 1i22yCreated on: 19-01-16 21:27 48963512710 Across 1. when the two alleles of a gene are identical for that characteristic (10) 5. how many pairs of chromosomes do we have? (6, 5) 6. it gives the body structure, rigidity and strength e.g. keratin in skin. (10, 8) 7. the different forms in which genes controlling a characteristic can occur. (7) 8. describes the genetic make-up of an organism (the combination of alleles). (8) 10. describes the observable, physical characteristics that an organism has. This is often related to a particular gene. (9) Down 2. it is DNA that codes for a particular protein and they carry the instructions that controll how you develop and function. (5) 3. what is DNA made up of? (11) 4. when the two alleles of a gene are different for that characteristic (12) 9. the twenty third chromosome pair (10, 3, 3)
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