-- card: 48868 from stack: in
-- bmap block id: 39752
-- flags: 0000
-- background id: 2665
-- name: 


-- part 1 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=264 top=222 right=244 bottom=303
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 25%


-- part 2 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=263 top=247 right=269 bottom=302
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 50%
----- HyperTalk script -----
on mouseUp
  global it
  add 1 to it
  if it = 1 then
    hide card field "cover I"
    hide card field "cover II"
  end if
  if it = 2 then
    hide card field "cover III"
    hide card field "cover IV"
  end if
  if it >=2 then
    put 0 into it
  end if
end mouseUp



-- part 3 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=263 top=271 right=293 bottom=302
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 75%


-- part 4 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=264 top=296 right=318 bottom=303
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 100%


-- part 5 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=426 top=223 right=245 bottom=465
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 25%


-- part 6 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=426 top=247 right=269 bottom=465
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 50%
----- HyperTalk script -----
on mouseUp
  global it
  add 1 to it
  if it = 1 then
    hide card field "cover V"
    hide card field "cover VI"
  end if
  if it = 2 then
    hide card field "cover VII"
    hide card field "cover VIII"
  end if
  if it >=2 then
    put 0 into it
  end if
end mouseUp



-- part 7 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=426 top=271 right=293 bottom=465
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 75%


-- part 8 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=427 top=296 right=318 bottom=466
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: 100%


-- part 9 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=292 top=87 right=118 bottom=330
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: cover I


-- part 10 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=292 top=122 right=153 bottom=330
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: cover II


-- part 11 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=313 top=316 right=338 bottom=413
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: RESTORE
----- HyperTalk script -----
on mouseUp
  SHOW CARD FIELD "COVER I"
  SHOW CARD FIELD "COVER II"
  show card field "cover III"
  show card field "cover IV"
  SHOW CARD FIELD "COVER V"
  SHOW CARD FIELD "COVER VI"
  SHOW CARD FIELD "COVER VII"
  SHOW CARD FIELD "COVER VIII"
end mouseUp



-- part 12 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=333 top=87 right=117 bottom=372
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: COVER III


-- part 13 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=333 top=122 right=152 bottom=372
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: COVER IV


-- part 14 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=422 top=88 right=119 bottom=460
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: cover V


-- part 15 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=422 top=124 right=153 bottom=460
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: cover VI


-- part 16 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=463 top=88 right=118 bottom=502
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: COVER VII


-- part 17 (field)
-- low flags: 00
-- high flags: 0001
-- rect: left=462 top=124 right=154 bottom=501
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: COVER VIII


-- part 18 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=205 top=315 right=337 bottom=256
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: NEXT
----- HyperTalk script -----
on mouseUp
  go to next card
end mouseUp



-- part 19 (button)
-- low flags: 00
-- high flags: 8003
-- rect: left=149 top=314 right=337 bottom=199
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: PREV.
----- HyperTalk script -----
on mouseUp
  go back
end mouseUp



-- part contents for background part 1
----- text -----
SEX LINKAGE

-- part contents for background part 2
----- text -----
Sex is determined by the composition of the sex chromosomes in an organism's genotype [XX = female,
XY = male]. The Y chromosome is generally devoid of genes while the X chromosome contains a fair number. This means that recessive genes on the X chromosome in males can be phenotypically expressed, even when occurring as a single dose, because the Y homologue very likely will have no masking dominant allele. In females, such recessives must be homozygous before they can be expressed. An exercise at the right demonstrates the phenomenon of sex linkage. It involves the inheritance of white eye color in Drosophila... a characteristic that is sex linked. You are asked to click on the buttons that describe the percentage of the final population that displays the phenotype in question. If you think the phenotype is not displayed at all, do not click on any button. These are reciprocal crosses. Run them both and then click on the lower scroll arrow to bring the rest of this material into view. Note that in each case, the female gametes are listed vertically on the left and the male gametes horizontally across the top of the Punnett square. Note also that the Y chromosome for the male is delineated as a /. 










You will note that in the cross with the white-eyed female, only the males display the white eye. All of the females appear normal but they are carriers.  In the cross with the normal eyed female, all of the F1 appear to have normal eye color. However flip to the next card for a continuation of this exercise.
 


-- part contents for background part 8
----- text -----
165

-- part contents for card part 9
----- text -----