Write the types of sex determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with male XO
(ii) Female ZW with male ZZ
(i) The type of sex determination mechanism shown in female XX with male XO is male heterogamety, e.g. humans.
(ii) The type of sex determination mechanism shown in female ZW with male ZZ is female heterogamety, e.g. birds.