Questions, 1-4 please answer, thanks!

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy

Are gametes exactly the same? explain why or why not?