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?

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?

anonymous · Answer

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