The mean and standard deviation of plant height from two rice plants (P1 and P2) and their progeny (F1 and F2) and a backcross generation (P1 x F1) are shown below. Complete the table by calculating the variances and coefficient of variation for each population and answer the questions which follow (See image) 1. Explain the possible reasons for the observed differences in the sample means. Account for the differences in the sample means of P1 and P2. Similarly, account for the differences in the sample means of the F1 and F2. Compare the difference in the parental generations with that in the filial generations. 2. Interpret the CV values from each population. 3. Compare the sample variances of P1 and P2. Account for any differences. Similarly, compare the sample variances of the F1 and F2 generations, and account for any differences. Give the possible causes of variation in each generation. 4. Calculate the broad-sense heritability of plant height in this species. Interpret your results.

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The mean and standard deviation of plant height from two rice plants (P1 and P2) and their progeny (F1 and F2) and a backcross generation (P1 x F1) are shown below. Complete the table by calculating the variances and coefficient of variation for each population and answer the questions
which follow (See image)

1. Explain the possible reasons for the observed differences in the sample means. Account for
the differences in the sample means of P1 and P2. Similarly, account for the differences in the
sample means of the F1 and F2. Compare the difference in the parental generations with that
in the filial generations.
2. Interpret the CV values from each population.
3. Compare the sample variances of P1 and P2. Account for any differences. Similarly, compare
the sample variances of the F1 and F2 generations, and account for any differences. Give the
possible causes of variation in each generation.
4. Calculate the broad-sense heritability of plant height in this species. Interpret your results.

Standard
Coefficient of
Population
Mean (in)
Variance
Deviation
Variation (CV)
P1
34.2
1.2
P2
65.3
0.8
F1
44.2
1.3
F2
46.3
1.9
BC1
39.7
1.1
Transcribed Image Text:Standard Coefficient of Population Mean (in) Variance Deviation Variation (CV) P1 34.2 1.2 P2 65.3 0.8 F1 44.2 1.3 F2 46.3 1.9 BC1 39.7 1.1
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