The children have a chance at being homogeneous for that trait. If the father was heterogeneous for the trait the four children will be heterogeneous and only one will be homogeneous for that trait.
The correct answer is that it is warmed and moistened already in nose and mouth, at the very beginning, when it enters our body (answer a).
It needs to be filtered and warmed alredy before it enters further, because our internal organs are delicate and a dry, dirty air would cause damage to our lungs and other organs.
it is found on the reccesive allele of the hemoglobin gene so c
Eliminating the others, I would think either G or K.