When cyclin D1 is expressed in normal levels, it stimulates the cell cycle. If overexpressed, it can promote cancer by allowing cells to overproliferate
The normal cyclin D1 gene, which has the potential to cause cancer if mutated and/or overexpressed, is known as what?
proto-oncogene
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Nucleotide substitutions are mutations that alter the ____________________, but not the ____________________, of nucleotides in a DNA molecule
Fill in the blank(s) with correct word
Uplift and formation of a mountain range divides a freshwater snail species into two isolated populations. Erosion eventually lowers the mountain range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of
a. sympatric speciation b. punctuated equilibrium c. allopatric speciation d. the gradual model of speciation
Why might serotonin be useful in combating obesity in humans?
What will be an ideal response?
Why does blockage of the coronary artieries often lead to a heart attack?
What will be an ideal response?