What is common between vegetative propagation and apomixis?

Statement-$X$: Apomixis is seen in a few flowering plants such as some species of $Asteraceae$ and grasses.
Statement-$Y$: Apomixis is a form of asexual reproduction that mimics sexual reproduction.
Statement-$Z$: In some species of apomictic seeds,the diploid egg cell is formed without reduction division.

In the type of apomixis known as adventive embryony,the embryo develops directly from the .......

Which of the following can be expected if scientists succeed in introducing an apomictic gene into hybrid varieties of crops?

What is the development of an organism from a female gamete or egg without fertilization called?

Embryo sacs of some apomictic species appear normal but contain diploid cells. Suggest a suitable explanation for the condition.