which of the following statements about seed formation in a flowering plant is true?
OR
Write a short note on seeds of angiosperm.
which of the following statements about seed formation in a flowering plant is true?
OR
Write a short note on seeds of angiosperm.
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A variety of pure-breeding snapdragons produces a tall plant with green seeds (WWSS). A second variety of pure-breeding snapdragons produce a short plant with white seeds (wwss). The two varieties are crossed, and the resulting seeds are collected. All of the seeds are green and when planted, they produce all tall plants (WwSs). These tall F1 plants are allowed to self-fertilize. The results for seeds and plant height in the F2 generations are as follows. What is the ?2 value, and the degrees of freedom for this experiment?
| F2 Plant phenotype | Observed # |
| Green seed, tall | 600 |
| White seed, tall | 175 |
| Green seed, short | 165 |
| White seed, short | 60 |
| Total | 1000 |
| ?2 = 6.1, df = 4 | ||
| ?2 = 6.1, df = 1 | ||
| ?2 = 0.4, df = 3 | ||
| ?2 = 0.4, df = 4 | ||
| ?2 = 6.1, df = 3 | ||
| ?2 = 0.4, df = 1 |
A variety of pure-breeding snapdragons produces a tall plant with green seeds (WWSS). A second variety of pure-breeding snapdragons produce a short plant with white seeds (wwss). The two varieties are crossed, and the resulting seeds are collected. All of the seeds are green and when planted, they produce all tall plants (WwSs). These tall F1 plants are allowed to self-fertilize. The results for seeds and plant height in the F2 generations are as follows. What is the ?2
value, and the degrees of freedom for this experiment?
| F2 Plant phenotype | Observed # |
| Green seed, tall | 588 |
| White seed, tall | 155 |
| Green seed, short | 162 |
| White seed, short | 95 |
| Total | 1000 |
| ?2 = 27.1, df = 1 | ||
| ?2 = 27.1, df = 3 | ||
| ?2 = 3.1, df = 3 | ||
| ?2 = 3.1, df = 4 | ||
| ?2 = 3.1, df = 1 | ||
| ?2 = 27.1, df = 4 |
