More Definitions
Punnett Square
| |
3/4
A_ |
1/4
aa |
| 3/4
B_ |
9/16
A_B_ |
3/16
B_aa |
| 1/4
bb |
3/16
A_bb |
1/16
aabb |
Epistasis
The influence of one gene on the expression of a different gene.
Duplicate Gene Action
Two genes affect the same trait and it is necessary to have at least
one dominant allele at one locus for the trait to be expressed.
Tri-hybrid Ratios
These ratios are due to three independently inherited genes.
Example:
purple vs white flower color
brown vs grey pubescence
resistant vs susceptible to phytophthora root rot
