Prac

Question 1

If a chromosome is in it’s condensed form, which phase of the cell cycle is it in?

Answer 1

During mitosis - condensing begins during prophase

Question 2

How many molecules in a mole?

Answer 2

6.03 x 10^23

Question 3

What is a Chi squared test used for?

Answer 3

It is a statistical analysis used to determine how well the practical ratios match the expected ratios.

Question 4

How is Chi squared (x^2) calculated? And how is the table used?

Answer 4

X^2 = ((observed - expected)^2) / expected
Sum of ^ for all of them
Using degrees of freedom column, find the range that the number is in (e.g. 50-80%)

Question 5

What does the chi square table tell you?

Answer 5

If your calculated X^2 number is within the range 50-80%, then there is a 50-80% chance that the hypothesis is true. Yet there is also a 20-50% chance that the variance is simply due to chance

Question 6

How do you calculate degrees of freedom for a chi-square test?

Answer 6

Number of phenotypes - 1