When the water in polluted with things such as trash.
<span>The chemoreceptor trigger zone is the area most responsible for the vomiting reflex. This is a part of the medulla, which is in the lower, more base, part of the brainstem. The vomiting center is a large group of axons and receptors that, when stimulated, produce an emetic response and will lead to a person vomiting.</span>
Whereas, female offsprings inherit X chromosome ( from each parent). As per the question, family has Y linked disease that affects father. Thus, there will be 100% chances of inheriting this disease by the male offspring.