Biology Combined - Cell Biology - Cell division

what are chromosomes made of

coiled strands of long DNA

how many chromosomes do humans have

46, found in 23 pairs

what happens during the interphase of the cell cycle

the genetic material is doubled

what happens during mitosis

the nucleus divides

what happens during cytokinesis

cytoplasm and cell membrane divide

what are the 3 phases of the cell cycle

interphase, mitosis, and cytokinesis

why is mitosis important

its for the growth and development of multicellular organisms

cell cycle length equation

observed number of cells in stage / total number of cells observed * total length of cell cycle

what is a stem cell

an undifferentiated cell of an organism

what do embryonic stem cells do

they help to form all the different tissues and organs needed during development

what is the role of adult stem cells

to replace cells lost through damage or to produce new cells for growth

what are meristem cells

they are unspecialised cells which can differentiate into the cells needed by the plant where growth it occuring

what can plant stem cells be used for

they can be used to produce clones of plants