cell division and stem cells

Question 1

What is mitosis?

Answer 1

• type of cell division used for
  ~ growth
  ~ repair of damaged cells
  ~ replacement of old cells
• Produces two daughter cells they are bot
  ~genetically identical
  ~ same amount of chromosomes as mother cell

Question 2

what is the result of uncontrolled Mitosis?

Answer 2

• Cancer

Question 3

(mitosis)
How many chromosomes does the mother cell have?

Answer 3

• 4 (two pairs)

Question 4

what happens during mitosis?

Answer 4

• DNA replicates and one copy of each chromosome go into each cell

Question 5

what is meiosis?

Answer 5

• type of cell division that occurs for
  ~ formation of sex cells for sexual reproduction
  ~

Question 6

(MEIOSIS)
how many cells does the mother cells have?

Answer 6

• 4 (2 pairs - diploid)

Question 7

What occurs during meiosis?

Answer 7

• DNA replicates but the
  chromosome and its copy remain
  attached.
  One of each pair of
  chromosomes goes into a new cells
• 4 new cells are formed
• Each cell has half the chromosomes the mother cell has
• haploid
• Cells are not genetically identical to the mother cell

Question 8

Inside the cell nucleus

Answer 8

• chromosomes are linear arrangements of genes
• Genes code for characteristics
  -Chromosomes come in
  pairs, one from each
  parent.
• genes come
  in pairs.
• An allele is a
  different version of the
  same gene.
  Gene = eye colour
  Allele = brown, blue,
  green or hazel

Question 9

what are stem cells?

Answer 9

• undifferentiated cells
• differentiate into any other type of cell

Question 10

What are the sources of stem cells?

Answer 10

• Embryonic tissue
• adult stem cells that occur in some tissue

Question 11

what can stem cells be used for?

Answer 11

• replace damaged or diseased tissue and so have many medical applications