Which of the following is an example of qualitative observation?
joseph is observing the color difference in the reaction mixture of each of the test samples to see what types of proteins are present in them.
joseph is measuring the color of the reaction mixture colorimetrically to see the concentration of proteins in the sample.
joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.

Joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.

Explanation:

Qualitative observation records data on the basis of our senses of sight, touch, smell, taste and hearing. This kind of obervation cannot be counted or measured. It cannot be recorded in terms of numbers. It describes the qualities of the data like color, texture, shape and others.

On the basis of above description, Joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution is the correct option. This is because color is a qualitative data.

the correct answer is sex-linked recessive.

i just took the test