B2 Flashcards
How are chromosomes found in the body?
In pairs
What is the series of stages that body cells devide in called?
Cell cycle
What happens to genetic material during the cell cycle?
It is doubled then divided into 2 identical nuclei in a process called mitosis
What does a cell need to do before it can grow?
Replicate the DNA to form 2 copies of each chromosome and increase the number of sub-cellular structures
Growth repair and development of multicellular organisms is important for what?
Mitosis cell division
Where does mitosis take place in a plant cell?
In the meristems found in the shoot and root tips
What can many types of plant cells do throughout life?
Retain the ability to differentiate throughout life
At what point of development do most types of animal cells differentiate?
An early stage
What do the egg and sperm cell fuse to form?
A zygote
What do embryonic stem cells differentiate to form?
All of the specialised cells of your body
What is bone marrow a good source of?
Adult stem cells
What can embryonic stem cells and adult stem cells do?
Be cloned and made to differentiate into many different types of cell
What conditions can treatments with stem cells help?
Paralysis and diabetes
What are stem cells from plant meristems used for?
To produce new plant clones quickly and economically for research, horticulture and agriculture
Why in therapeutic cloning is an embryo produced with the same genes as the patient?
So the stem cells produced are not rejected
