In a population of 1000 fruit flies, 640 have red eyes (wild type) and the remainder have sepia eyes. the sepia eye trait is recessive to red eyes. how many individuals would you expect to be homozygous for red eye color?

160

Explanation:

Data provided in the question:

Population of fruit flies = 1000

Population with red eyes = 640

Now,

q² for the population = 360 ÷ 1000 = 0.36

or

q = √0.36

or

q = 0.6

Therefore,

p = 1 − q

= 1 - 0.6

= 0.4

Hence,

The homozygous dominant frequency = p² = 0.4 × 0.4

= 0.16

Individuals we would expect to be homozygous for red eye color

= p × population

= 0.16 × 1000

= 160

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