NEW
Font size
WorksheetsCheckpoint: Nature vs Nurture
Total questions: 13
Worksheet time: 6mins
These chemical tags inactivate or silence a gene.
acetyl groups
methyl groups
histones
genes
Why do identical twins begin to look different as they age?
they look identical but their DNA has always been different
Mutations accumulate which deactivates histone proteins.
The addition of epigenetic tags result in changes in gene function.
The DMNT gene is silenced.
What role do cell signals play in cell specialization?
Cell signals encourage DNA replication at the promoter.
Cell signals silence genes unrelated to the cell's purpose.
Cell signals are influenced by temperature changes.
None of the above.
The protein DNA wraps around to form a nucleosome.
Gene
Chromosome
Nucleus
Histone
The DNA is tightly wrapped around the histone proteins and the gene is methylated.
The gene is silenced.
The gene is active.
It is impossible to tell.
The gene is on and off at various times.
What is true of an active gene?
The DNA is so compact that it can leave the nucleus and travel to the ribosome.
It is hyper-methylated.
The DNA is tightly coiled around the histones and accessible by RNA.
The DNA is more relaxed and can be transcribed by RNA.
True or False: Epigenetic changes are permanent.
True
False
True or False: Epigenetic changes can be passed on to future generations.
True
False
Epigenetics modulates genetic expression:
differently in each cell in the body.
by altering the genome.
in response to only intracellular processes.
consistently throughout an individual's life.
A traumatic event experienced by an organism can affect the health of its children and grandchildren. This can happen through inherited:
epigenetic tags.
polypetide chains.
transcription factors.
DNA nucleotide patterns.
DNA methylation patterns are generally:
predictable
substantially altered when an individual smokes.
inherited from the parents.
set early in embryonic development.
Gene regulation occurs:
only in some cells.
when the variability within the genetic code is insufficiently adaptive for the individual to survive in its environment.
constantly, in all known life forms.
during embryonic development.
