======Genetic Inheritance in Brassica rapa======


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**Alternative titles:** Inheritance with Fast Plants
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====Summary====                   
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====Procedure====  
  - Begin with seeds from two crossbred parent lines that are homozygous dominant for one trait and homozygous recessive for the other.  
  - Plant F1 seeds and record phenotypes (tall vs. dwarf, purple vs. green stems).  
  - Infer genotypes of the F1 plants from the observed phenotypes.  
  - Use Punnett squares to predict expected genotype and phenotype ratios for the F2 generation.  
  - Plant F2 seeds, grow them under controlled conditions, and record phenotypes for both traits.  
  - Compile individual and combined class data to increase sample size.  
  - Compare observed results with predictions, analyze discrepancies, and calculate ratios.



====Links==== 
Biology 1107 Lab 2 || Plant Genetics - aceconnect: 
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📄 Genetic inheritance in Brassica rapa - Australian Curriculum: [[https://v8.australiancurriculum.edu.au/resources/work-samples/samples/genetics-practical-above/]]\\


====Variations====
 * Test additional traits in Fast Plants, such as leaf color (yellow-green vs. green) or rosette growth habit.
  * Use digital tools to simulate Punnett squares and compare with experimental outcomes.



====Safety Precautions====
  * Wash hands after handling soil, fertilizer, and plant tissue.  
  * Keep water away from electrical grow lights and equipment.  
  * Use scissors or cutters safely when trimming plants.


====Questions to Consider====
  * What phenotypes were observed in the F1 generation? What does this reveal about dominance? (All F1 were tall and purple, showing T and P are dominant.)  
  * What ratios did you predict for the F2 generation using a Punnett square? (Expected 9:3:3:1 phenotypic ratio for tall-purple : tall-green : dwarf-purple : dwarf-green.)  
  * How close were the observed ratios to predictions? Were deviations due to chance, environment, or experimental error?  
  * How does combining class data improve reliability compared to using only one group’s results?  
  * What evidence supports Mendel’s laws of segregation and independent assortment in your experiment?