Cell Division Flashcards
New Cells are Needed for an Organism to _______.
Grow.
New Cells are Needed to __________ Cells that Become Worn Out and to Repair Damaged ___________.
Replace…Tissue…
New Cells Must Have the Same ___________ Information as the Originals so they can do the Same ______.
Genetic…Job…
Each of Your Cells has a Nucleus that Contains _______________.
Chromosomes.
Chromosomes Carry the ________ that Contain the Instructions for Making Both _____ Cells and all the Tissues and Organs Needed to Make an Entire New You.
Genes…New…
A Gene is a Small Packet of Information that Controls a ________________ of your Body. It is a Section of ______, the Unique Molecule that Makes Up Your Chromosomes.
Characteristic…DNA…
Most of Your Characteristics are the Result of Many Different Genes Rather than a __________ Gene. The Genes are Grouped Together on Chromosomes. A _________________ may Carry Several Hundred or Thousand Genes.
Single…Chromosome…
How Many Chromosomes do we have in the Nucleus of our Body Cells?
46.
How Many Pairs of Chromosomes are there?
23.
In Each Pair of Chromosomes, One Chromosome is Inherited From the _________ and One From the _________.
Father…Mother…
Sex Cells (___________) Only Have One Chromosome from Each Pair, so Only have ____ Chromosomes in Total.
Gametes…23…
Body Cells Divide in a Series of Stages Known as the Cell _________.
Cycle.
What is Stage 1 of the Cell Cycle?
The Longest Stage. Replication of DNA to Form Two Copies of Each Chromosome and Synthesis of New Sub-Cellular Structures. The Cells Grow Bigger Increase in Mass, Increase the Number of Sub-Cellular Structures Such as Mitochondria, Ribosomes or Chloroplasts.
What is Stage 2 of the Cell Cycle?
Mitosis (Nucleus Divides). In this Process, One Set of Chromosomes is Pulled to Each End of the Dividing Cell and the Nucleus Divides.
What is Stage 3 of the Cell Cycle?
Cell Divides into Two. This is the Stage During which the Cytoplasm and the Cell Membranes Also Divide to Form Two Identical Daughter Cells.
Cell Division in the Cell Cycle Involves a Process Called ___________ and it Produces Two ___________ Cells.
Mitosis…Identical…
Cell Division by Mitosis Produces the Additional Cells Needed for Growth and Development in ________________ Organisms, and for the Replacement of Worn Out or _____________ Cells.
Multicellular…Damaged…
In ____________ Reproduction, the Cells of the Offspring are Produced by Mitosis From the Cells of Their _________. This is Why they Contain Exactly the Same Genes as their Parent with Little or No Genetic _____________.
Asexual…Parent…Variation…
How long can the Cell Cycle Take?
Between 24 Hours and Several Years Depending on the Cells Involved and the Stage of Life of the Organism.
At what Point Does the Cell Cycle Slow Down?
After Puberty.
In Som Parts of an Animal or Plant, ___________ Cell Division Carries on Rapidly All the Time.
Mitotic.
About ______ Million of Your Body Cells Die Every Minute, so Cell Division by _____________ is Very Important.
300…Mitosis…
In a Child, __________ Divisions Produce New Cells Faster than the Old Ones Die. As an Adult, Dell Death and ___________ Keep More or Less in Balance. When You’re Elderly, Mitosis Slows Down and You Show the Typical Signs of ___________.
Mitotic…Mitosis…Ageing…
