In a genetics experiment, the researcher mated two Drosophila fruit flies and ob

Q: In a genetics experiment, the researcher mated two Drosophila fruit flies and ob

Solution: total number of offspring = 300 ( a ) probability that the fly has normal eye color and normal wing size = 137 / 300 ( b ) the probability that the fly has vermillion eyes = ( 3 + 153 ) / 300 = 156 / 300 ( c ) the probability that the fly has either vermillion eyes or miniature wings, or both = ( 3 + 153 + 7 ) / 300 = 163 / 300 Eye colour wing size wing size normal miniature normal 137 7 vermillion 3 153

ID: 3048222 • Letter: I

Question

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. (Enter your probabilities as fractions.)

(a) What is the probability that the fly has normal eye color and normal wing size?

(b) What is the probability that the fly has vermillion eyes?

Wing Size

Eye Color Normal Miniature

Normal 137 7

Vermillion 3 153

Explanation / Answer

Solution:

total number of offspring = 300

( a )

probability that the fly has normal eye color and normal wing size = 137 / 300

( b )

the probability that the fly has vermillion eyes = ( 3 + 153 ) / 300 = 156 / 300

( c )

the probability that the fly has either vermillion eyes or miniature wings, or both = ( 3 + 153 + 7 ) / 300

= 163 / 300

Eye colour wing size wing size normal miniature normal 137 7 vermillion 3 153

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In a genetics experiment, the researcher mated two Drosophila fruit flies and ob

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