PROBLEM D
Consider a hypothetical quantitative trait (a weight of some kind) affected by five loci for the two individuals (1) and (2). Assume the following:
Complete dominance at each locus. No epistasis.
The independent effect of each dominant allele is +8 lb.
The independent effect of each recessive allele is -3 lb.
The phenotypic mean for the trait = 600 lbs.
(BV= breeding value, G=Genotypic Value, GCV=gene combination value, E= environmental effect on animal's preformance, P=Phenotypic Value)
BV
G
GCV
E
P
(1) AaBbCcDdEe
-15
(2) AAbbCCddEE
+12
Fill in the blanks in the table above and answer the following questions:
D1. Which individual is heavier? Why?
D2. Which would produce heavier offspring (on average)? Why?
ALLELIC ACTION
PROBLEM E
Given the following values for performance of genotypes, what type of allelic action is represented in each situation?
CC
Cc
cc
Situation 1
44
33
22
Situation 2
44
66
23
Situation 3
44
44
15
Situation 4
44
40
21
PROBLEM D
Consider a hypothetical quantitative trait (a weight of some kind) affected by five loci for the two individuals (1) and (2). Assume the following:
Complete dominance at each locus. No epistasis.
The independent effect of each dominant allele is +8 lb.
The independent effect of each recessive allele is -3 lb.
The phenotypic mean for the trait = 600 lbs.
(BV= breeding value, G=Genotypic Value, GCV=gene combination value, E= environmental effect on animal's preformance, P=Phenotypic Value)
| BV | G | GCV | E | P | |
| (1) AaBbCcDdEe | -15 | ||||
| (2) AAbbCCddEE | +12 |
Fill in the blanks in the table above and answer the following questions:
D1. Which individual is heavier? Why?
D2. Which would produce heavier offspring (on average)? Why?
ALLELIC ACTION
PROBLEM E
Given the following values for performance of genotypes, what type of allelic action is represented in each situation?
| CC | Cc | cc | |
| Situation 1 | 44 | 33 | 22 |
| Situation 2 | 44 | 66 | 23 |
| Situation 3 | 44 | 44 | 15 |
| Situation 4 | 44 | 40 | 21 |
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