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A student recorded the weight of over 10000 bean seeds and graphically presented the data as shown below - VCE - SSCE Biology - Question 26 - 2014 - Paper 1
Question 26
A student recorded the weight of over 10000 bean seeds and graphically presented the data as shown below. The seeds came from bean plants grown in identical environm... show full transcript
Worked Solution & Example Answer:A student recorded the weight of over 10000 bean seeds and graphically presented the data as shown below - VCE - SSCE Biology - Question 26 - 2014 - Paper 1
Step 1
Explain how all bean plants are homozygous for seed weight.
Answer
All bean plants being homozygous for seed weight indicates that they have uniform genetic traits that dictate seed weight. This uniformity minimizes variations, leading to a concentrated weight distribution in the seeds, as shown in the graph.
Step 2
Discuss the impact of multiple genes on seed weight.
Answer
The weight of bean seeds is influenced by multiple genes, reflecting polygenic inheritance. Each gene contributes a small effect on weight, which, when combined, results in a continuous range of seed weights. This is consistent with the normal distribution observed in the data.
Step 3
Analyze how similar soil moisture contributes to seed weight.
Answer
Maintaining similar soil moisture content ensures that all plants have equivalent access to water, which is crucial for seed development. Consistent water supply fosters uniform growth conditions, further stabilizing seed weights across the population.
Step 4
Evaluate the influence of different temperatures on bean plant growth.
Answer
Variations in temperature can significantly affect the metabolic rates, growth, and overall health of the bean plants. Different growth temperatures can lead to differences in seed weight, as temperature influences physiological processes and genetic expression in plants.