Question

The dorsal pigment pattern of frogs can be either leopard or mottled. The trait is controlled by an autosomal gene. Males and females are selected from pure-breeding populations, and a pair of reciprocal crosses is performed. The cross results:

Cross 1: P: Male leopard female mottled
F1: All mottled
F2: 70 mottled, 22 leopard
Cross 2: P: Male mottled female leopard
F1: All mottled
F2: 50 mottled, 18 leopard

In the F2 progeny from both crosses, what proportion is expected to be heterozygous and what proportion is expected to be homozygous?

Answer 1

so to figure out proportions.. ad up all species.. then divide by the one u want to know the proportion of.