2. For the experimental crosses, your instructors made certain to collect virgin

Question

2. For the experimental crosses, your instructors made certain to collect virgin flies for the P generation cross. They did not make you collect virgin flies for the Fi x Fi cross. Why is it necessary to create the F2 generation? (In other words, why is okay that the Fi females may have mated with their brothers before you set up the Fix Fi cross, but it was not okay for the P generation lies to have mated with their brothers?) (2pt) have virgins to create the FI generation, but not necessary to have virgins to 3. Fly life cycle matching. Match a-c with the name and definition. (1.5pts) a. Growth and molting b. Pupal stage c. End of the Pupal stage i. Metamorphosis -reshaping of an organism's body plan. ii. Larval progression from 1st to 3rd instar iii. Eclosure - hatching from pupa.

Explanation / Answer

Fly life cycle undergo three stages of development before emerging as development.

Egg ,Larva ,Pupa.

A) Growth and molting - ii Larval progression from1st to 3rd instar

Fly undergo molting stage known as instar,dur dur which the head , mouth, cuticles, spiracles and hook are shed

During larva's .3rd instar it crawl to a drier area to pupate.

B) Pupal Stage - iii Eclosure - hatching from Pupa

Flies begin as egg from which they hatch from larva

C)End of the Pupal Stage -- I Metamorphosis -reshaping of an organisms body plan

Flies pusses it way through anterior end of the Puparium known as opperculum.

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