Lab 2: Transgenes

Question 1

If the transgene is on the X chromosome, white eyes will never be associated with _______, and pigmented eyes will never be associated with _______

Answer 1

females will never have white eyes
males will never have pigmented eyes

Question 2

If the transgene is on the 2nd chromosome, white eyes will never be associated with _______, and pigmented eyes will never be associated with _______

Answer 2

White eyes will not be assoicated with straight (wild-type) wings
Pigemented eyes will not be associated with curly wings

Question 3

If the transgene is on the 3rd chromosome, white eyes will never be associated with ______, and pigmented eyes will never be associated with _______

Answer 3

white eyes won’t be associated with long (wild type) bristles
red eyes won’t be associated with stubble bristle

Question 4

Nondisjunction in Meiosis I

Answer 4

Final cells:
50% one extra
50% one lost

Question 5

Nondisjunction in Meiosis II/Mitosis

Answer 5

Final cells:
50% normal
25% one extra
25% one lost

Question 6

____ gametes typically do not have an extra chromosome

Answer 6

sperm