selective breeding Flashcards
process of selective breeding?
-choose stock w best characteristics
-breed them w each other
-select best offspring
-breed them together
positives of selective breeding?
-inc productivity of cows
-inc num of sheep offspring
-inc crop yield
why are some fish kept in tanks?
-water can be monitored to check temp/ph level
-to control food
-water can be filtered
what are restriction enzymes?
-recognise specific sequences of DNA nd cut DNA to these points
what do ligase enzymes do?
-used to join 2 pieces of DNA together
recombinant DNA?
2 diff bits of dna stuck together
what is a vector?
used to insert DNA into other organisms
2 sorts of vectors?
-plasmids
-virusues
how genetic engineering works…
-DNA you want is cut using restriction enzyme
-vector DNA cut using same enzyme
-ligase joins 2 pieces
-forms recombinant DNA which is inserted into other cells
what does transgenic mean?
-they contrain genes transferred from other species
concerns about genetically modifies crops?
-transplanted genes may get into enviroment
-some are against it
how can genetically modification inc production?
-making crops insect resistant
-making crops herbicide resistant
micropropagation? (4)
-explants removed
-explants sterilised and grown
-cells in explants divide
-moved in soil to grow
