GCSE Biology

what is the process of embryo transplants
- sperm cells are taken from best bulls
- eggs cells taken from best cow
- sperm cells and egg cells fuse in a dish
- each fertilised egg grows into an embryo
- embryo cells seperated
- the identical embryos grow into identical cows
- each embryo is implanted into a different host mother
adult cell cloning
- cells from the udder of an adult sheep x are taken nucleus is extracted
- unfertilised egg cell taken and the nucleus removed from sheep y
- nucleus from sheep x in inserted into the empty cell of sheep y
- an electric shock causes the egg cell to start dividing to form a ball of cells (an embryo)
- the embryo is placed in a surrogate mother
how do we produce insulin using genetic engineering
- insulin gene cut out of human chromosme using enzymes
- human insulin gene inserted into bacterial DNA
- bacterial DNA inserted back into bacterium
- bacterium reproduces asexually
- insulin gene makes insulin
- insulin extracted and purified for use
tissue culture
- a small peice of tissue is taken
- placed in hormones to help it grow
- after about 12 weeks roots and shoots start to appear
- the new organism is planted
cuttings
- cuttings are taken eachw ith a new bud on
- the cuttings are keept in moist conditions until they are ready to plant

Author

ghoran

157019

Card Set

GCSE Biology

Description

revision

Updated

2012-06-03T14:03:30Z