<P> For genes on separate chromosomes, each allele pair showed independent segregation . If the first filial generation (F generation) produces four identical offspring, the second filial generation, which occurs by crossing the members of the first filial generation, shows a phenotypic (appearance) ratio of 9: 3: 3: 1, where: </P> <Ul> <Li> the 9 represents the proportion of individuals displaying both dominant traits </Li> <Li> the first 3 represents the individuals displaying the first dominant trait and the second recessive trait </Li> <Li> the second 3 represents those displaying the first recessive trait and second dominant trait </Li> <Li> the 1 represents the homozygous, displaying both recessive traits . </Li> </Ul> <Li> the 9 represents the proportion of individuals displaying both dominant traits </Li> <Li> the first 3 represents the individuals displaying the first dominant trait and the second recessive trait </Li>

How many different phenotypes appear in the f2 generation of a dihybrid cross