The first question would be 2, 47 sex cells
the second question would be 4, specific genes
the third question would be 4, 100%
The liter is the metric unit for volume. Branching off that are milliliters, deciliters, kiloliters, etc...
The short pea plant will be recessive while the tall pea plant will be the dominant.
When a dominant and a recessive allele are combined, the dominant allele covers up the recessive allele. Making it so that the recessive allele usually not show up.