Black Mexican sweet corn has short ears, while Tom Thumb popcorn has long ears. When these...
Black Mexican sweet corn has short ears, while Tom Thumb popcorn has long ears. When these two purebreeding lines are crossed, the length of the F1 ears are intermediate to the two parents. When the F1 plants are intermated, two of the 2,050 F2 offspring are the same size as the Black Mexican sweet corn parent, and two of the F2 offspring are the same size as the Tom Thumb parent. A. What is the average frequency of a parental type in the F2? B. How many genes control ear length in corn?
Homework Answers
Tom Thumb popcorn has long ears
sweet corn has short ears
so if we consider the alleles are L fr long ears , l for short year
F1 L L
l Ll Ll
l Ll Ll
F2 L l
L LL Ll
l lL ll
2/2050 = 0.09% of LL or ll type
one gene controls the ear length
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