In terms of the investigation about the type of earlobe free or attached), name the following 2.1
The dependent variable
(1)
2.2
The independent variable
(1)
Formulate a hypothesis for the frequency of tongue-rollers as compared to non-rollers in your
school
(3)
Construct a table to show the results obtained in this investigation
(4)
According to the results obtained, would you accept or reject the hypothesis formulated in
QUESTION 3?
(1)
State TWO ways in which you could make the results of this investigation more reliable
(2)
Using the same system of axes, draw a bar graph to represent the percentage of learners displaying
each phenotype for each of the three characteristics
(8
Use the symbols R (tongue-roller) and (nor-rolen) to represent the phenotypes and genotypes of
offspring resulting from a cross between tivo heterozygous individuals
(6)​