mix of stem cells /mitosis
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What happens when 2 genetically identical cells are formed?
the cell membrane splits
When during interphase are organelles replicated
during cell growth
How is therapeutic cloning performed? (5) (DON’T NEED TO KNOW!)
• take an egg cell from a women donor and remove the nucleus • take a body cell from the patient and put the patient’s nucleus into the empty egg 3.give it a tiny electric shock so it acts like a fertilised egg • it will form a zygote, the cloned zygote will divide into an embryo 5.take the embryonic stem cells to use to grow tissues, organs or replace cells
Give 3 advantages of therapeutic cloning
-can treat patients that have currently untreatable disease -reduced risk of rejection -can grow organs for transplants and research
Give 5 disadvantages of therapeutic cloning DOMSC -I would skip
-finding suitable donors is DIFFICULT -embryonic stem cells are hard to OBTAIN(must be collected before birth) -risk of MUTATIONS -no guarantee how SUCCESSFUL they’ll be -risk of CONTAMINATION
Give 4 ethical issues of therapeutic cloning LOUC -I would skip
• some think using and destroying embryos is morally wrong -argue that is it not right to create life then destroy it -worry that embryos might be seen as products instead of potential life -people disagree on when an embryo should be considered a person
GAP FILL: the bigger an organism is the …………. the SA:Vol ratio is
the bigger an organism is the SMALLER the SA:Vol ratio is
TRUE or FALSE in a SA:Vol ratio ,the volume will always be 1
TRUE!
What is the formula for SA:Vol ratio?
SA / Volume