Which of the below best describes the focus of the questions in the dichotomous key

Nucleic acid certain protein cell membranes certain carbohydrates

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis