A change in what type of cell is most likely to cause a mutation that can be inheri

Ras is a proto-oncogene that is within the EGF pathway. The EGF receptor can activate the cell division pathway only when the EGF ligand binds to the receptor. A gain of function mutation occurs in only one copy of the Ras gene. What are all the possible consequences of this? Select all that apply. Group of answer choices The cell will undergo constant cell division The cell will still be normal as only one copy of Ras is mutated. Both copies must be mutated for the cell to undergo constant cell division There will be an increase of EGF ligands present in the cell The EGF receptor will always be active even with no EGF ligands bound and activate the pathway Ras will always be active and activate the proteins downstream that will turn on cell division Ras will be under the influence of the EGF receptor and will only activate if the EGF ligand is bound to the receptor

Which of the following types of mutations would be most likely to cause cells to undergo apoptosis (programmed cell death)?     One that increases the affinity of p21 for Cdks     One that decreases the affinity of Rb for the transcription factor E2F     One that decreases the ability of p53 to bind to DNA     One that causes p53 to be constitutively phosphorylated

Epigenetic changes include all of the following EXCEPT: 1) changes in DNA sequence 2) DNA coiling 3) methylation 4) gene expression

Epigenetics: 1) are DNA mutations in response to the environment 2) injuries proteins 3) changes the amount of proteins produced

What types of behaviours or environmental circumstances can lead to changes in an individual’s epigenome? Explain.