Question

A study looked at the effect of relative humidity and eye color on number of eggs laid in a 24hr period for Drosophila melanogaster. Two relative humidities (10 and 70%) and two eye colors (sepia and white) were used. Twenty females of each eye color were isolated with five wild-type males and allowed to lay eggs on a thin layer of a larval food source. The adults were removed after 24hrs and eggs were counted using a stereo microscope. For this experiment, an independent variable is A eye color B.temperature C. number of eggs laid in 24hrs Dlarval food source

Answer 1

The answer will be D

* A study looked at the effect of relative humidity and eye colour on number of eggs laid in a 24 hour period for Drosophila melanogaster Two velative humidity - Two eye colours na sepia I white I EXPERI 20 females of each eye colour were isolated with five wild-type males and allowed to lay eggs on a thin layer of a larwal food rowece que adults were removed after 24 hours and eggs were counted using a stereo microscope . MENT

factors of dependence - • Effect of relative hy • (environmental O actor). Dependent • Eye colour of flies (genotype) Dependent Number of eggs laid (Result of both in 24 hours genotype and environment Dependent •Temperature is important for the life cycle in Drosophida Mating → Egg laying → Metabolism Optimum temperature being 24 °C -25°c. versa. Also, due to temperature Humidity varies. * Temperature - Relative S vice- increases humidity decreases. harwal food source is the independent variable as We are looking into the number of eggs laid in 24 hours not how the next generation after egg laying is performing /obserwation of phenotype. This the variable that whose variation does not dep end on that of another