Unit 2: Cell Replication + Meiosis Flashcards
What happens in G1?
Cell grows
What is meiosis?
Cell division of the gametes
What happens in S?
DNA replication
What happens in G2?
Cell prepares for mitosis
During what phase does cell division occur?
Cytokinesis
During what phase do G1, S and G2 occur?
Interphase
What is DNA helicase?
An enzyme which breaks down bonds between bases
What type of replication occurs when DNA strands split and form a template for a new DNA strand?
Semi-conservative replication
Where do free bases come from?
The food we eat
Which enzyme links the nucleotides?
DNA polymerase
What happens during interphase?
No cell division
What happens during prophase
The chromosomes condense, the nuclear envelope disappears and the spindles begin to form
What happens during metaphase?
The chromatids attach to the spindle fibres and they line up along the equator
What happens during anaphase?
Spindle fibres contract and centromere splits, one pulled to each pole
What happens during telophase?
The cytoplasm divides and the nuclear envelope reappears, the spindles disintegrate and the chromosome begins to uncoil