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Dihybrid Cross - A Genetics Definition

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Dihybrid Cross

Dihybrid Cross

© Steve Berg
Definition: A dihybrid cross is a breeding experiment between P generation (parental generation) organisms that differ in two traits.

Related Terms: Monohybrid Cross, F1 generation, F2 generation, P generation, True-breeding Plant
Examples:
In this dihybrid cross, a plant with the dominant traits of green pod color and yellow seed color is cross-pollinated with a plant with the recessive traits of yellow pod color and green seed color.

If a true-breeding plant with green pod color (GG) and yellow seed color (YY) is cross-pollinated with a true-breeding plant with yellow pod color (gg) and green seeds (yy), the resulting offspring will all be heterozygous for green pod color and yellow seeds (GgYy).

Related Resources: Chromosomes and Gender, Law of Segregation, Independent Assortment
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