B2.7 Cell Division Flashcards
How does this produce genetically identical cells ?
Each cell gets a complete new copy
How and why do body cells divide ?
Divides into two by mitosis
How many sets of chromosomes are found in body cells and sex cells ??
23 pairs
Which type of cell division forms gametes and why is it important?
Meiosis
It creates variation
What is a stem cell ?
A cell that can be used for any specific type of use
What is an allele ?
A different form or version of the same cell
What is a gene code for ?
It contains instructions to create a specific protein
What are polydactyl and cystic fibrosis ? How are they both passed on ?
Polydactyl is caused by a dominant allele which causes extra fingers or toes
Cystic fibrosis is caused by a recessive allele an causes thick sticky mucus in the air passages
What are issues surrounding embryo screening ?
- The rejected embryos are destroyed
- expensive
- encourages prejudice against disabled people
