Understanding Monohybrid Crosses: Inheritance of Single Traits
Learn about monohybrid crosses and how single traits are inherited in genetics!
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A genetic cross involving one trait, also known as a monohybrid cross, examines the inheritance of a single characteristic. For example, when crossing pea plants for flower color, one might cross a plant with purple flowers (PP) with one that has white flowers (pp). The offspring (F1 generation) will all be heterozygous (Pp) and display the dominant trait (purple flowers). When these F1 plants are self-crossed, the F2 generation will show a 3:1 ratio of dominant to recessive traits.
FAQs & Answers
- What is a monohybrid cross? A monohybrid cross is a genetic cross that examines the inheritance of one specific trait, such as flower color.
- What ratio do you expect in the F2 generation of a monohybrid cross? In the F2 generation of a monohybrid cross, the expected ratio of dominant to recessive traits is 3:1.
- How can dominant and recessive traits be identified? Dominant traits are expressed in the phenotype over recessive traits and can be identified by examining offspring characteristics.
- What role do genotypes play in inheritance? Genotypes determine the genetic makeup of an organism, influencing which traits are expressed in the phenotype.