Lab Reportname Section 4 Write a hypothesis describing the phenotype of the germinating tobacco seeds. Include the approximate number of seedlings and percentages that will have a dominant trait and recessive trait out 50 seeds. Create a Punnett square using Data Table 1, showing the possible F2 generation outcomes from a cross between a heterozygous male and a heterozygous female for the germinating tobacco seeds. The dominant allele is written as “G” for green and the recessive allele for albino/yellow color is written as “g”. Data Table 1: Hypothetical Punnett Square Father ( ____ ____ ) x Mother ( ____ ____) Mother ■ Father ■ Gametes Count the number of seedlings that are green versus those that are yellow and record the data in Data Table 2. Data Table 2 – Seedling data Seedling Color Green Yellow Total Number of Seedlings Percentage of Total Compare the expected outcome to actual results found in Data Table 2, write this information into Data Table 3. Data Table 3 – Frequency calculations Frequency Expected Values Actual Values Green Yellow Total Questions: What are the predicted ratios of the phenotypes (green to yellow) in the plants? What were the actual ratios of the phenotypes (green to yellow) displayed in the tobacco plants? If all yellow seedlings were removed from the population, would the next generation still have a chance at displaying the yellow allele? Explain your answer. Would a cross between a homozygous and a heterozygous parent show the same ratios? Explain why it may be important to collect data from a larger population. Exercise 2 – Dihybrid Crossing with Corn Count the number of purple, yellow, smooth, and wrinkled seeds on the ear of corn between the lines in Figures 4-7 and record the data in Data Table 4.
Lab Reportname Section 4 Write a hypothesis describing the p
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