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1. Sesame plants (that produce sesame seeds) have either 3 pods per node or one

ID: 212923 • Letter: 1

Question

1. Sesame plants (that produce sesame seeds) have either 3 pods per node or one pod per node. 1-pod per node is dominant. At a second, independently sorting locus, normal leaf is dominant to wrinkled leaf.

a. What would the genotypes for the parents be given the following offspring: 150 1-pod normal; 145 1-pod wrinkled; 52 3-pod normal; 49 3-pod wrinkled?

b. In a cross between two parents heterozygous at each locus, you get the following data: 878 1-pod normal; 315 1-pod wrinkled; 295 3-pod normal; 112 3-pod wrinkled. Is this within the range of what is expected? Use a Chi-square goodness of fit test to support your answer

Explanation / Answer

Ans 1. P = one pod (PP or Pp)             L = normal leaf (LL or Ll)
p = three-pod (pp) l = wrinkled leaf (ll)

Ans 2.