Who proposed Mendel's conclusions in the form of laws?

The phenotypic ratio of $3:1$ proves which of the following?

Which of the following is a genetically dominant trait in human beings?

The leaf colour of certain plants is controlled by one gene. For that gene,the allele $G =$ orange and $g =$ green. You have a plant with orange leaves,but do not know whether that plant's genotype is $GG$ or $Gg$. If you cross your unknown plant with one of the plants whose genotype is listed below,you will be able to determine your unknown's genotype. With which plant would you cross it?

What is the first law of Mendel?

When heterozygous tall plants are self-pollinated,tall and dwarf plants are obtained. This is explained by: