Biology Past Questions and Answers

Which of the following statements about phenylthiocarbamide (PTC) is not correct?

Which of the following characters is not an example of discontinuous variation?

Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted?

The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as

The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as