B2 Flashcards
What is the first stage of the cell cycle
The cell replicates their dna to make 2 of every chromosome
What is the second stage of the cell cycle
Mitosis: one set of chromosomes is pulled to each end of the dividing cell, the nucleus divides
What is the third stage of the cell cycle
The cytoplasm and cell membrane divide to form two new identical cells
How many chromosomes does a human body cell have
23
What does differentiate mean
Cells go through the process of changing and becoming specialised
In a plant where does mitosis take place
Meristems
Why is it easier to clone a plant
Because the cells can become unspecialised
What are stem cells
Cells that are unspecialised and are found in the human embryo and in bone marrow
What could stems cells be used to treat
Paralysis
Macular degeneration
Diabetes
What are the benefits of cloning plants
Plants can be saved from extinction
Lots of plants can be produced cheaply
What is a problem against using stem cells
Embryonic stem cells come from aborted embryos
some people think it is a lot of money which could be used to treat other medical conditions.
What is the second stage of cells dividing called
Mitosis
What is therepeutic cloning
a cloned Embryo is produced that has same genetics as the patient who needs treatment so stem cells produced aren’t rejected
what can bone marrow stem cells only differentiate Into
blood cells but embryonic can differentiate into any
