Worksheet on sex-linked genes using fruit flies to demonstrate X-linked inheritance of eye color.

1. white eyed, male; red eyed, male; white eyed, female; red eyed, female

2. white eyed, male; red eyed, female (heterozygous); white eyed, female; red eyed, male

3. X^W X^w & X^W Y
How many are:
white eyed, male: 1/4
white eyed, female: 1/4
red eyed, male: 1/4
red eyed, female: 1/4

4. X^W X^W & X^w Y
How many are:
white eyed, male: 1/2
white eyed, female: 0
red eyed, male: 0
red eyed, female: 1/2

5. X^W X^w & X^w Y
How many are:
white eyed, male: 1/4
white eyed, female: 1/4
red eyed, male: 1/4
red eyed, female: 1/4

Math: In the above cross, 100 males were produced and 200 females were produced. How many total white eyed flies would there be? 150