s1654999 s1654999

09-06-2021
Biology

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In fruit flies, long wings are a dominant trait (L) and short wings are a recessive trait (l). Two fruit flies that are heterozygous for the long wings trait mate. The cross produces 180 offspring. How many of the offspring are expected to have short wings?

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mathmate mathmate

16-06-2021

Answer:

45

Explanation:

Both parents are hetero-zygous, so each has alleles Ll.

When Ll crosses with Ll, we have

LL 25%

Ll 50%

ll 25%

So out of 180 offspring, we expect about 25% to have short wings, or

25%*180 = 45

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