In aquaculture, farmers often use hormone-treated feed to produce all-male tilapia populations for food production, because male tilapia grow significantly faster than females.
In one trial of tilapia aquaculture, a batch of fry reared with hormone-treated feed produced 185 male tilapia out of a total of 192 tilapia. Calculate the success of producing males as a percentage of the total number of tilapia. Give your answer to 1 decimal place.
Describe the control group that should be used in this investigation to compare against the hormone-treated group.
Predict the expected percentage of male tilapia in this control group.
74 exam-style questions on Edexcel IGCSE Biology Food production. Each one has a worked solution and a mark scheme showing where the marks go.