Cell divison Flashcards
Which process do body cells divide by?
Mitosis
What do the chromosomes contains?
Genetic information
What happens during mitosis?
1) copies of the genetic material are made
2) cell divides once to form 2 genetically identical body cells
What does mitosis occur during?
Growth / production of replacement cells
Body cells have 2 sets of chromosomes. How many do gametes have?
One set (23)
What are the male and female reproductive organs?
Male - testes
Female - ovaries
What do the cells in the ovaries and testes do?
Divide to form gametes
What is the type of cell division which forms gametes
Meiosis
What happens during meiosis?
1) copies of the genetic information are made
2) cell divides twice to form 4 gametes, each with a single set of chromosomes
What happens when gametes join at fertilisation?
A single body cell with new pairs of chromosomes is formed
How does the single body cell produced at fertilisation divide by?
Mitosis
Do plant or animal cells retain the ability to differentiate throughout life?
Plant. Animal cells only differentiate at an early stage
In mature animal cells, what is cell division mainly restricted to?
Repair and replacement
What are the cells from human embryos and adult bone marrow called?
Stem cells
What can stem cells do?
They have the ability to develop into any kind of cell
