While doing fieldwork in Madagascar, you discover a new dragonfly species that has either red (R) or clear (r) wings. Initial crosses indicate that R is dominant to r. You perform three crosses using three different sets of red-winged parents with unknown genotype and observe the following data: $$\begin{array} { | l | l | }
\hline \text { Cross } & \text { Phenotypes } \
\hline 1 & 72 \text { red-winged, } 24 \text { clear-winged } \
\hline 2 & 12 \text { red-winged } \
\hline 3 & 96 \text { red-winged } \
\hline
\end{array}$$ Which cross is likely to have at least one parent with the genotype RR?
A) cross 1
B) cross 2
C) cross 3
D) crosses 1 and 2
E) crosses 2 and 3

Question

While doing fieldwork in Madagascar, you discover a new dragonfly species that has either red (R) or clear (r) wings. Initial crosses indicate that R is dominant to r. You perform three crosses using three different sets of red-winged parents with unknown genotype and observe the following data: $$\begin{array} { | l | l | } 
\hline \text { Cross } & \text { Phenotypes } \
\hline 1 & 72 \text { red-winged, } 24 \text { clear-winged } \
\hline 2 & 12 \text { red-winged } \
\hline 3 & 96 \text { red-winged } \
\hline
\end{array}$$ Which cross is likely to have at least one parent with the genotype RR?
A) cross 1
B) cross 2
C) cross 3
D) crosses 1 and 2
E) crosses 2 and 3

Quizplus · Accepted Answer

The Answer of While doing fieldwork in Madagascar, you discover a new dragonfly species that has either red (R) or clear (r) wings. Initial crosses indicate that R is dominant to r. You perform three crosses using three different sets of red-winged parents with unknown genotype and observe the following data: $$\begin{array} { | l | l | } 
\hline \text { Cross } & \text { Phenotypes } \
\hline 1 & 72 \text { red-winged, } 24 \text { clear-winged } \
\hline 2 & 12 \text { red-winged } \
\hline 3 & 96 \text { red-winged } \
\hline
\end{array}$$ Which cross is likely to have at least one parent with the genotype RR?
A) cross 1
B) cross 2
C) cross 3
D) crosses 1 and 2
E) crosses 2 and 3

While Doing Fieldwork in Madagascar, You Discover a New Dragonfly