In a cross between two doubly heterozygous Ursa gummi, we observe 654 Brave Ursa
ID: 96847 • Letter: I
Question
In a cross between two doubly heterozygous Ursa gummi, we observe 654 Brave Ursa gummi and 468 Timid Ursa gummi. If the Brave phenotype is the dominant phenotype, make a decision as to whether these data are consistent with the duplicate recessive epistatic mode of inheritance. Make your decision based on a significance level threshold of 5%.
A. Decision is: Yes, they are. Chi-square p-value < 0.05.
B. Decision is: yes, they are. Chi-square p-value > 0.05.
C. Decision is: no, they are not. Chi-square p-value < 0.05.
D. Decision is: no, they are not. The mode of inheritance is Recessive Epistasis.
E. Decision is: no, they are not. Chi-square p-value > 0.05.
ANSWER IS NOT C
Explanation / Answer
If they are duplicate recessive the ratio should be 9:7 (dominant:recessive)
Degree of freedom is 1.
Themost probable decision will be E.