Genetics B13.7 0.0 / 5 ? BiologyEvolution, extinction and natural selectionGCSEAQA Created by: person_oneCreated on: 13-03-22 16:46 Genotype Group of alleles that determine an organism's characteristics. eg BB 1 of 12 Phenotype A persons physical characteristics eg brown eyes 2 of 12 Dominant gene The gene that is more powerful (you only need one to see it in a phenotype) eg Bb leads to brown eyes 3 of 12 Recessive gene Less powerful gene (two are needed to see in phenotype) eg bb leads to blue eyes 4 of 12 Homozygous Two of the same alleles in a gene eg BB or bb 5 of 12 Hetrozygous Two different alleles in a gene eg Bb 6 of 12 Allele Different versions of the same type of gene eg B or b (both express eye colour but one is brown, one is blue) 7 of 12 Is polydactyly recessive or dominant? Dominant 8 of 12 What is cystic fibrosis? A disorder of cell membranes 9 of 12 Is cystic fibrosis recessive or dominant? Recessive 10 of 12 What is a person's genotype? Group of alleles that determine an organism's characteristics. 11 of 12 What is a chromosome? A molecule of DNA, associated with proteins (histones) 12 of 12
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