Science test:

• What words means differences in species? 


  Variation.
• What causes the changes to make different genes? 


  Mutation.
• Give one factor that cause these differences.

  Inheritance.
• Give another factor that causes the differences in genes. 


  Environmental.
• What do we call the different forms of the same gene?

  Allele.
• What group of people are useful to study to look at types of variation? 


  Twins.
• What do we call the theory where the most adapted organisms survive?

  Natural selection.
• Give one example of selective breeding. 


  Strawberry for sweetness.
• Give one advantage of selective breeding? 


  You get the characteristic you want.
• Give one disadvantage of selective breeding? 


  Inbreeding and mutations.
• Genetic engineering is when we swap a gene from organism to another.
• What do scientists use to cut out a gene? 


  Enzymes.
• Which hormone used to treat diabetes is produced by genetic engineering? 


  Insulin.
• Complete the steps in the process of natural selection.

  1. Variation is caused by a mutation
  2. Some organisms are better adapted
  3. These organisms survive and breed
  4. The genes are passed on to the offspring