lesson 12 cell division by mitosis Flashcards
in the nucleus what do we find
chromosomes which are made of the molecule DNA
body cells contain what
two of each chromosome- meaning they are paired
human body cells contain what
23 pairs of each chromosome
what are gametes
they have chromosomes which are not paired
what do human gametes have
23 single chromosomes
chromosomes carry what
a large number of genes which determine man of our features
most human chromosomes contain how many
hundreds
animals and plants contain a very large number of cells, meaning the cells have to what
they have to be able to divide which is called cell cycle
cells can divide by either what
mitosis or meiosis
in the first stage of the cell cycle, what occurs
the DNA replicates to form two copies of each chromosome
during the first stage of the cell cycle what also happens with the cell
it grows and copies its internal features, such as mitochondria and ribosomes
in the second stage of the cell cycle what takes place
mitosis
as mitosis takes place in the second stage of the cell cycle, what occurs
one set of chromosomes is pulled to each part of the cell and the nucleus also divides
in the final stage of the cell cycle what occurs
the cytoplasm and the cell membrane divide to form two identical cells
at the start of cell division by mitosis we had 1 cell which had two pairs of chromosomes and at the end we had what
two identical cells, each with two pairs of chromosomes
