Two Yeast Cells, One of Type a and the Other

question 24

Multiple Choice

Two yeast cells, one of type a and the other of type α, are in proximity to each other. The a yeast cell has a mutation in the gene for the α factor receptor protein such that the receptor does not translocate to the plasma membrane of the a cell. If both cells secrete their respective a and α factors, which of the following outcomes is most likely to occur?

• A) The a and α cells will grow toward each other.
• B) The a cell will grow towards the α cell, but the α cell will not grow toward the a cell.
• C) The α cell will grow toward the a cell, but the a cell will not grow towards the α cell.
• D) The a and α cells will not grow toward each other at all.

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