You and Your Genes 3.0 / 5 based on 1 rating ? BiologyDNA and inheritanceGCSEOCR Created by: missbeetleCreated on: 24-06-13 18:12 Where do genes occur? Genes are found in long DNA strands called chromosomes. 1 of 5 Difference in individuals of the same species are called variations. What may variations be due to? Genes: A characteristic may have been inherited by your parents. Or. Enivornmental Factors: How the enviorment changes how a person looks. 2 of 5 What is a genotype and what is a phenotype? A genotype is the genetic make-up of an organism. A phenotype is the physical characteristics of an organism. 3 of 5 What is an allele? An allele is a There are two copies of each gene we have, and these copies of each gene can be different. These are alleles. 4 of 5 What is a reccesive allele and what is a dominant allele? A recessive allele need two alleles to display the characteristic 5 of 5
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