Selective breeding

• how does selective breeding work?

  1. select those with the best characteristics you want and breed them together
  2. select best offspring and breed them together
  3. continue this over many generations= characteristics become more stronger
• 1 problem with selective breeding?

  inbreeding - causes some breeds to be prone to diseases or inherited defects
• how does genetic engineering work?

  1. identify the gene you want to transfer
  2. use enzymes to isolate this gene and transfer it into a plasmid or a virus (vectors)
  3. desired gene is transferred into the cell of wanted organism
• What are the pros of genetic engineering?

  1. increased yield
  2. added nutrients
• how does cutting take place?

  1. a small piece of plant is removed
  2. end is dipped in rooting powder
  3. produces genetically - identical clone
• how does tissue culture take place?

  1. take plant and divide it into hundreds of tiny pieces = contain small cells
  2. these small cells are incubated with plant hormones
  3. it stimulates growth and develop clones