Cell Division Flashcards
(16 cards)
The average human has how many chromosomes?
46
Where are chromosomes located?
the nucleus
What are chromosomes made from?
DNA
What do chromosomes carry?
genes
female is…
XX
male is…
YY
What type of cells will have no nucleus?
red blood cells
What needs to happen before a cell can divide?
chromosomes need to copy themselves
What four reasons do cells need to divide by mitosis?
1) growth
2) skin cell replacement
3) asexual reproduction
4) repairing tissue
Before mitosis occurs, the cell _______.
grows
The genetic material doubles when the DNA _________.
replicates
After the chromosomes have been pulled to each end of the cell, the cytoplasm ____________.
divides
What is a stem cell?
A single cell that can replicate itself or differentiate into many cell types.
What is an advantage of stem cell use?
1 of:
-stem cell research can be used to aid discovery of treatments for diseases such as cancer
-stem cell research may occur illegally if it was banned, so it is better for the government to legalise it and regulate it heavily
-stem cell research can be used to treat diseases such as diabetes and nerve paralysis
What is a disadvantage of stem cell use?
-if the sample of stem cells is contaminated by a virus, they could be transmitted to the patient.
-The current restrictions may not be followed inside labs.
-There is destruction of embryos produced from fertilisation. Some believe that life starts after fertilisation, so it’s essentially killing.
What type of cell division causes a change in the number of E.Coli?
binary fission
