# Question: genetics coursework part a a geneticist discovers a single primrose...

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Genetics Coursework

**Part A**: A geneticist discovers a single
primrose with yellow flowers. All other primroses have orange
flowers. The geneticist crosses the yellow primrose with one of the
orange primroseand obtains 66 yellow and 61 orange progeny. The
geneticist crosses two of the yellow primroses from the progeny of
the first cross, and obtains 89 yellow and 32 orange primroses.
Explain these results by sketching the two crosses, giving the
combinations of heritable factors and associated traits for parents
and progeny. At the top of your answer, define the symbols used for
heritable factors. For example: Let the heritable factor for orange
be X. Let the heritable trait for yellow be y.

**Part B**: In Jimsweed, blue flowers are
determined by the heritable factor B and white flowers by the
heritable trait b. Blue flowers are dominant to white flowers. Self
pollination in a blue plant produces 28 blue floweredprogeny and 10
white flowered progeny. What fraction of all blue flowered progeny
will breed true when self pollinated?