What are differences between asexual and sexual reproduction?
Asexual
- only one parent
- no genetic variation
Sexual
- 2 parents
- variety in offspring
Describe the adult cell cloning process?
- cell taken from sheep wanted to clone and nucleus removed
- egg cell taken from another sheep and nucleus removed
- nuclus 1 inserted into egg cell
- Electric shock given to stimulate division
- inserted into sheeps womb
What are the 2 types of plant cloning?
Cuttings
Tissue culture
Describe tissue culture
Few plant cells taken and grown in growth medium with hormones
New plants grow
Describe the embryo transplant process…
- embryo made from gamete of too quality cows
- embryo produced and divied into cells
- these cells produce identical embryos
- inserted into cow
- genetically identical clones born
What is genetic enigineering?
When certain genes are cut out using enzymes and transferred to other cells
What are pros of GM crops?
-increase yield
- developing countries can GM crops to have needed nutrients in them
- grown in other places with no problem
What are cons of GM crops?
- could affect number of weeds and insects- reducing biodiversity
- not safe - allergies
- may get into environment and cause super weed
What was darwins theory if evolution?
-Evolution by natural selection
-Individuals within a species showed variation
-Some had better suiting characteristics so survived and reproduced passing
on strong genes
Why as darwins theory knly gradually acceoted?
Challenged theory of god
Insufficient evidence
Mechanism of inheritance hadn’t been discovered
What was larmarks theory?
He believed that is a characteristic was used alot it would become stronger and pass on
He believed changes in and organisms life
time could be inherited
What is an ecological relationship?
How living things interact
What is an evolutionary relationship?
How they are related
