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In gorgonzolas, there are three recessive traits that affect the organism\'s app

ID: 26559 • Letter: I

Question

In gorgonzolas, there are three recessive traits that affect the organism's appeal: shrunken fruit, foul-smelling flowers, and short height. A heterozygote was crossed with a homozygote, yielding the following offspring: (46 foul-smelling),( 44 shrunken fruit, short height), (8 short height), (8 shrunken fruit), (7 foul-smelling, short height), (6 foul-smelling, shrunken fruit), (3 foul-smelling, shrunken fruit, short height), and (1 normal phenotype). What would the genetic map look like, and what are the map distances?

Explanation / Answer

Let f = allele for foul-smelling flowers; s = allele for shrunken fruit; and h = allele for short height

The genetic map would be as follows:

-----f----------s-----h-----

Distance from f to s: 10 arbitrary units

Distance from s to h: 5 arbitrary units

Total length of segment: 20 arbitrary units