#3 In a genetics experiment, the researcher mated two Drosophila fruit flies and
ID: 3316238 • Letter: #
Question
#3 In a genetics experiment, the researcher mated two Drosophila fruit flies and observed the traits of 300 offspring. The results are shown in the table.
One of these offspring is randomly selected and observed for the two genetic traits.
(a) What is the probability that the fly has normal eye color and normal wing size? (Enter an exact number as an integer, fraction, or decimal.)
______________
(b) What is the probability that the fly has vermillion eyes? (Enter an exact number as an integer, fraction, or decimal.)
_______________
(c) What is the probability that the fly has either vermillion eyes or miniature wings, or both? (Enter an exact number as an integer, fraction, or decimal.)
_______________
Explanation / Answer
a) P(normal eye and normal wing size) = 131 / 300
b) P(vermillion eyes) = (3+160)/300 = 163/300
c) P(vermillion eyes or miniature wings) = P(vermillion eyes) + P(miniature wings) - P(vermillion eyes and miniature wings)
= (3 + 160)/300 + (6 + 160)/300 - 160/300
= 169/300
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