B2.7 Cell Division

Question 1

How does this produce genetically identical cells ?

Answer 1

Each cell gets a complete new copy

Question 2

How and why do body cells divide ?

Answer 2

Divides into two by mitosis

Question 3

How many sets of chromosomes are found in body cells and sex cells ??

Answer 3

23 pairs

Question 4

Which type of cell division forms gametes and why is it important?

Answer 4

Meiosis

It creates variation

Question 5

What is a stem cell ?

Answer 5

A cell that can be used for any specific type of use

Question 6

What is an allele ?

Answer 6

A different form or version of the same cell

Question 7

What is a gene code for ?

Answer 7

It contains instructions to create a specific protein

Question 8

What are polydactyl and cystic fibrosis ? How are they both passed on ?

Answer 8

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

Question 9

What are issues surrounding embryo screening ?

Answer 9

• The rejected embryos are destroyed
• expensive
• encourages prejudice against disabled people