Quorum sensing is triggered to begin when
treatment with antibiotics occurs
bacteria release growth hormones
bacterial protein expression is switched on
a sufficient number of bacteria are present

Quorum sensing is triggered to begin when a sufficient number of bacteria are present .

Explanation:

Quorum sensing -

Quorum sensing is the ability to detect and to respond to the cell population density by the process of gene regulation . Quorum sensing bacteria releases some chemical signal molecules called the autoinducers , that increases the concentration as the function of the cell density .

The detection of the minimum threshold concentration of an autoinducer leads to the alteration in the gene expression .

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.