What is the first law of Mendel?

Which statement is correct for genes located on different pairs of homologous chromosomes?

What does a test cross involve?

Which of the following statements is correct?

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?

Which of the following is $NOT$ consistent with the Law of Dominance?