In Corn, Small Pollen (Sp) Is Recessive to Normal Pollen $\begin{array}{cl}s p^{+} & z n^{+} \\\hline s p & z n\end{array} \times\begin{array}{cc}s p^{+} & z n^{+} \\\hline s p & z n\end{array}$

In corn, small pollen (sp) is recessive to normal pollen (sp⁺) and banded necrotic tissue, called zebra necrotic (zn) , is recessive to normal tissue (zn⁺) . The genes that produce these phenotypes are closely linked on chromosome 10. If no crossing over occurs between these two loci, give the types of progeny expected from the following cross: $\begin{array}{cl}s p^{+} & z n^{+} \\\hline s p & z n\end{array} \times\begin{array}{cc}s p^{+} & z n^{+} \\\hline s p & z n\end{array}$

A) sp⁺ zn⁺/sp zn; sp zn/sp zn
B) sp⁺ zn/sp zn; sp zn⁺/sp zn
C) sp⁺ zn⁺/sp⁺ zn⁺; sp⁺ zn⁺/sp zn; sp zn/sp zn
D) sp⁺ zn/sp⁺ zn; sp⁺ zn/sp zn⁺; sp zn⁺/sp⁺ zn; sp zn⁺/sp zn⁺
E) sp⁺ zn⁺/sp zn; sp⁺ zn/sp zn