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6. (2) Supposing shell color in a certain clam is controlled by a single gene. Using
appropriate symbols that you specify, please explain the following results by providing
four Punnett Squares. Give a short explanation of your logic as needed. THE
SYMBOLS THAT YOU USE HAVE TO EXPLAIN ALL FOUR OF THESE CROSSES
(these are not independent problems)
a. yellow shells X black shells produce ½ yellow offspring + 2 black offspring
b. black shells X black shells produce 100% black offspring
c. orange shells X orange shells produce 34 orange offspring + 4 black offspring
d. yellow shells X orange shells produce 1/4 orange with yellow spots + 1/4 orange
+4 yellow+4 black