A genetic cross between parents that differ in two characteristics, controlled by genes at different loci. Mendel performed a dihybrid cross using pea plants and the characteristics of seed colour and texture: the parental plants had either smooth yellow seeds (SSYY)—the dominant characteristics—or wrinkled green seeds (ssyy)—the recessive characteristics. All the offspring had smooth yellow seeds, being heterozygous (SsYy) for the two alleles. Crossing between these offspring produced an F2 generation of plants with smooth yellow, smooth green, wrinkled yellow, and wrinkled green seeds in the ratio 9:3:3:1 (see illustration). Mendel used these results as the basis for his Law of Independent Assortment (see mendel’s laws). Compare monohybrid cross.
Dihybrid cross
- common-collector connection
- common consent arguments
- Common Criteria
- Common Data Security Architecture
- common denominator
- common depth point
- common-depth-point stack
- common difference
- common-drain connection
- common-emitter connection
- common-emitter forward-current transfer ratio
- common envelope binary
- common external tariff
- common factor
- common fraction
- common-gate connection
- Common Gateway Interface
- common gateway interface
- common good
- common-impedance coupling
- common instance
- Common Intermediate Format
- common ion
- common knowledge
- common land