Use this information to answer the next five
questions. In mice, the allele for black coat color (B)
is dominant over the brown allele (b). Two heterozygous
mice are mated, and produce the following offspring:
20 black
4 brown
1. What is the EXPECTED FREQUENCY of black and brown mice in the
offspring from this cross?
5 black: 1 brown
3 black: 1 brown
2 black: 1 brown
1 black: 3 brown
Answer B
QUESTION 7
What is the EXPECTED NUMBER of offspring from this cross:
20 black, 4 brown
18 black, 6 brown
6 black, 18 brown
4 black, 18 brown
QUESTION 8
A chi-square test statistic is calculated from the above
observed and expected numbers of individuals of particular
phenotypes.
True
False
QUESTION 9
For this calculation and this problem, how many degrees of
freedom would there be?
1
2
3
4
QUESTION 10
If the p-value for the above problem were 0.01, you would
conclude that:
p is greater than 0.05, there is a significant difference
between the observed numbers and expected numbers of particular
offspring phenotypes.
p is greater than 0.05, there is NO significant
difference between the observed numbers and expected numbers
of particular offspring phenotypes.
p is less than 0.05, there is a significant
difference between the observed numbers and expected numbers
of particular offspring phenotypes.
p is less than 0.05, there is NO significant
difference between the observed numbers and expected numbers
of particular offspring phenotypes.