2b.4 - Stem Cells Flashcards
What are stem cells?
They are undifferentiated cells that can develop into different types of cell depending on the instructions they’re given
Where are stem cells found? (2)
- In early human embryos
- In bone marrow
Which type of stem cell is more versatile and why?
Embryonic because bone marrow stem cells can only turn into certain types of cell where embryonic stem cells can turn into any
Why is stem cell research important?
Stem cells may be able to cure many diseases
Why are some people against stem cell research?
- Embryos are potential human life
- Should concentrate research on finding other sources of stem cells
Why are some people in favour of stem cell research? (2)
- Curing people who already exist is more important than embryos
- They are unwanted from abortion clinics
How many pairs of matched chromosomes are there?
22
Why is the 23rd pair of chromosomes different to the rest?
They are labelled XX or XY
Which chromosome causes male characteristics?
Y
How can you find the probability of getting a boy or girl?
Draw a genetic diagram
What is the probability of getting a girl?
50%
