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Question 7 (11.111111111 points)

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The poultry breeding program wants to improve egg production, which is influenced by multiple genes and environmental factors. They realize that selection for this complex trait requires different strategies than selecting for simple single-gene traits. What approach would be most effective?
Question 7 options:

Focus only on environmental factors since genes don't influence complex traits

Combine quantitative genetics methods with environmental management for optimal results

Use simple Punnett squares to predict egg production in all breeding combinations

Select only for one gene at a time until all contributing genes are identified

Answer 1

Combine quantitative genetics methods with environmental management for optimal results.

Rationale: egg production is a polygenic, quantitative trait influenced by many genes and environment. Effective improvement uses quantitative approaches (heritability estimates, selection on estimated breeding values or selection indices, genomic selection when available) together with management changes (nutrition, housing, health, lighting) to express genetic potential. The other choices (ignoring genetics, using simple Punnett squares, or trying to identify and select one gene at a time) are inadequate for a complex trait.