2.1 Producing New Cells Flashcards
What is a diploid?
The normal number of chromosomes in a cell. In humans this is 23 pairs (46).
What is mitosis.
Normal cell division.
What is mitosis for? (3)
Growth, repair of damaged cells, and maintaining the diploid chromosome complement.
What are chromatids?
Strands of duplicated chromosome.
What is the equator?
The middle of the cell where the chromosomes (pairs of chromatids) line up.
What are spindle fibres?
Where the chromosomes attach to; they pull the chromatids apart to the poles.
What are stem cells?
Unspecialised cells which can divide in order to self-renew. They have the potential to become different types of cell.
What are stem cells involved in?
Growth and repair.
Organs work together to form systems, what is the hierarchy?
Cells < tissues < organs < systems
