Chromosomes and Cell Growth
This component is made up of DNA and histone proteins
What is asexual organisms?
The rest phase, non-dividing phase
What is G0 phase?
The results of meiosis
Substances known to cause cancer
What are carcinogens?
The center that holds together two sister chromatids
The phase when DNA is replicated
What is the S phase?
The condition when molecules on the cell surface signal to stop
What is contact?
When pairs of homologous chromosomes or sister chromatids fail to separate
What is non-disjunction?
Cells that uncontrollably divide
What are cancer cells?
______ pull apart from each other during anaphase.
The G1 checkpoint
The cells that do not divide when fully formed
What are muscle and nerve cells?
The exchange of genes on homologous chromosomes
What is crossing-over?
What are embryonic stem cells?
The two reasons why cells divide
- DNA "overload"
- Ratio of surface area to volume
The role of spindle fibers during mitosis
Proteins that respond to events inside the cell, like checkpoints
What are internal regulators?
The phase where sister chromatids separate to opposite poles of the cell
What is anaphase II?
The process where cells shrink and shrivel in a controlled way
The reason why smaller surface area to volume ratio is better
What is better function?
- DNA cannot control a cell when it is too big
- materials cannot get in quick enough and wastes cannot be excreted quick enough
The pinching that occurs in animal cells during cytokinesis
What is a cleavage furrow?
What are cyclins?
A cell with half the number of chromosomes
What is a haploid cell?
Cells found in different tissues of the body that might be used to maintain and repair the same tissue they reside in
What are adult stem cells?