Question

The odds of developing of cancer can be increased by ______.

		turning off oncogenes
		turning on tumor suppressor genes
		both a and b
		neither a nor b

Epigenetics explains why all cells in the body are not the same, even though the cells have the same genes (except for sex cells).

True

False

Answer 1

1)ANSWER IS OPTION D --- neither a nor b

A cell become cancerous when the proto oncogene in the cell get activated to oncogene by mutation.( turning on of oncogene)

Tumor suppressor gene are normal genes that slow down cell division, repair DNA mistakes, or tell cells when to die (a process known as apoptosis or programmed cell death). When tumor suppressor genes don't work properly, cells can grow out of control, which can lead to cancer.

2) TRUE

Epigenetics is the study of heritable changes in gene expression that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype .

Epigenetic marks can change how a cell reads the DNA instructions. This causes some cells to read certain genes more, while others will read those same genes less. These differences help give us the wide variety of cell types in our bodies – even though they all have the exact same DNA