Science Revision 9A 0.0 / 5 ? ScienceAll LevelsEdexcel Created by: CallanCreated on: 10-05-13 15:27 What does 'genetic information' mean? The instructions found in genes that control your characteristics. 1 of 12 Changes in genes are called: Mutations. 2 of 12 How many chromosomes does a human have? 46 3 of 12 What is a zygote? Different versions of the same gene. 4 of 12 For a recessive allele to have an effect, the alleles on both chromosomes must be: Recessive. 5 of 12 Cystic Fibrosis is a genetic disease that: Damages the lungs and makes digestion difficult. 6 of 12 State one variation of pear trees and the environmental factor that causes it. Larger leaves - not enough light. 7 of 12 Why can't hybrid animals reproduce? The two parent species didn't give the same number of chromasomes. 8 of 12 What is genetic modification? A process in which the genes of an organism are altered, often by adding another species' genes. 9 of 12 Why are some people against GM crops? Becaus they think the chemicals can affect their systems. 10 of 12 Plants cloning themselves is called: Asexual reproduction. 11 of 12 How does a plant breeder make sure that only pollen from one flower pollinates another flower? They put a plastic bag over the flower. 12 of 12
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