Multiple crosses were made between true-breeding lines of yellow lily plants. All the F1 progeny were yellow. When these yellow F1 plants were crossed, they produced an F2 consisting of 149 yellow-flowered lily plants, and 11 with red flowers! Propose a biochemical pathway for flower color in these lily plants based on the type of epistasis you chose above and correlate each genotype with the phenotype that would occur in your pathway along with the frequency of each genotype.
Added by Craig H.
Step 1
In the F2 generation, the ratio of yellow to red is approximately 13:1 (149 yellow to 11 red). This suggests that the red flower color is likely due to a recessive allele, and there may be an epistatic interaction involved. Show more…
Show all steps
Your feedback will help us improve your experience
Sana Riaz and 83 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Two plants with white flowers, each from true-breeding strains, were crossed. All the F1 plants had red flowers. When these F1 plants were intercrossed, they produced an F2 consisting of 177 plants with red flowers and 142 plants with white flowers. Assuming two independently assorting genes dictate flower color. Given the data above, provide an explanation for the inheritance of flower color in this plant species. Propose a biochemical pathway for flower pigmentation and indicate which genes control which steps of the pathway. Please explain in details
Sana R.
Two plants with white flowers, each from true-breeding strains, were crossed. All the $\mathrm{F}_{1}$ plants had red flowers. When these $\mathrm{F}_{1}$ plants were intercrossed, they produced an $\mathrm{F}_{2}$ consisting of 177 plants with red flowers and 142 with white flowers. (a) Propose an explanation for the inheritance of flower color in this plant species. (b) Propose a biochemical pathway for flower pigmentation and indicate which genes control which steps in this pathway.
8. The following biochemical pathway provides the basis for flower color in a plant. Three independently-assorting genes (A, B, and C) are involved in this pathway, and they code for enzymes A, B, and C, respectively. Three recessive mutations are also known, each of which interrupts a different step in this pathway, as shown above. Stopping the pathway prematurely due to a mutation in one of these three genes results in the phenotype colorless, yellow, or green, depending on which gene (A, B, or C) was mutated. Determine the phenotypic results in the F1 and F2 generations resulting from the crosses of purebreeding parental plants listed here. a. Speckled (AABBCC) X yellow (AAbbCC) b. Yellow (AAbbCC) X green (AABBcc) c. Colorless (aaBBCC) x green (AABBcc)
Katlin K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD