1. Use the words provide to complete the passage bellow
Stem cells, embryo, eight, meiosis, specialised, tissues, mitosis
Once an egg is fertilised it divides by _______________ and forms an __________, made up of embryonic _________________. These cells can divide to produce any type of _______________ cell. After the ____________ cell stage the cells form _______________ and organs.
2. Some stem cells are extracted from a cloned embryo. Number the stages in the correct order to show how a cloned embryo is produced. The first one has been done for you.
__1__ Take an egg cell
_____ An embryo forms
_____ Insert the nucleus from a body cell of an adult you want to clone.
_____ Remove the genetic material
_____ The inactive genes in the body cell’s nucleus are switched on under the right condition.
_____ Extract embryonic stem cells.
3. Describe how stem cells are currently used in medicine
4. How are embryonic stem cells different from adult stem cells?
