1)what process must occur between the F1 parents and the F1 gametes?

2)What process occurs between the gametes to poduce the F1 or F2 stage?

1)

http://en.wikipedia.org/wiki/Meiosis

2)

http://www.answers.com/topic/fertilization

1) The process that must occur between the F1 parents and the F1 gametes is called meiosis. Meiosis is a type of cell division that is necessary for sexual reproduction, as it produces gametes with half the number of chromosomes as the parent cell. During meiosis, the parent cell goes through two rounds of division, resulting in four daughter cells called gametes. These gametes, also known as sperm or eggs, are genetically different from each other and from the parent cells. Through meiosis, the genetic material from both parents is shuffled and recombined, leading to genetic variation in the offspring.

To understand meiosis in more detail, you can refer to the Wikipedia page on Meiosis: http://en.wikipedia.org/wiki/Meiosis

2) The process that occurs between the gametes to produce the F1 or F2 stage is called fertilization. Fertilization is the fusion of a sperm cell (from the male) and an egg cell (from the female) to form a zygote. During fertilization, the genetic material from both the sperm and the egg combines to form a unique combination of genes in the zygote. This process is crucial for sexual reproduction and leads to the development of offspring with traits from both parents.

To learn more about fertilization, you can refer to the Answers.com page on fertilization: http://www.answers.com/topic/fertilization