\documentclass{jarticle}
\usepackage{booktabs}

\begin{document}

\begin{tabular}{@{}cccccccc@{}}
\toprule
& \multicolumn{2}{c}{Wing Color} & \multicolumn{2}{c}{Genotype} & \multicolumn{3}{c}{Offspring} \\
\cmidrule(l{.75em}r{.75em}){2-3}\cmidrule(l{.75em}r{.75em}){4-5}\cmidrule(l{.75em}r{.45em}){6-8} 
Pair \#  & Mother & Father & Mother & Father & XX & Xx & xx \\
\midrule
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
1 & blue & green & AA & Aa & 1 & 1 & 0 \\
\bottomrule
\end{tabular}

\end{document}
