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Mendel's F1 and F2 results led him to propose that reproducing organisms

Question
Mendel's F1 and F2 results led him to propose that reproducing organisms
each trait is controlled by a single copy of a factor (gene)
each trait is controlled by two copies of a factor (now called genes) present in sexually
traits are entirely controlled by environment, not genes
traits cannot be passed between generations
Answer
each trait is controlled by two copies of a factor (now called genes) present in sexually
Detailed Explanation
Mendel proposed that two copies of a factor (gene) controlling each trait are present in sexually reproducing organisms.
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