Question at position 6 What is dual selection?Males compete for access to matesA mutual agreement between two partners to have sexA group decides who should be allowed to have sexMales and females both make mate choice decisions

Question

Question at position 6 What is dual selection?Males compete for access to matesA mutual agreement between two partners to have sexA group decides who should be allowed to have sexMales and females both make mate choice decisions

BlackTom AI · Accepted Answer

Dual selection refers to a mating system in which both sexes exercise mate choice — that is, males and females both evaluate potential partners and make selective decisions.

1. Relevant concepts
- Sexual selection has two primary components: intrasexual selection (competition within one sex, e.g., males fighting males) and intersexual selection (mate choice by one sex, typically females choosing males).  
- “Dual” or mutual sexual selection occurs when intersexual choice is performed by both sexes, so both males and females display traits and evaluate partners. This often arises when both sexes benefit from being choosy (e.g., when both provide parental care or when mate quality strongly affects fitness).

2. Step-by-step reasoning
- Start from definitions: if only one sex exercises choice, selection is one-sided (e.g., classic female choice and male competition).  
- If both sexes are choosing, selection pressures act on both sexes’ traits (ornamentation, displays, courtship behavior), producing mutual mate-choice dynamics.  
- Therefore, dual selection logically describes the situation “males and females both make mate choice decisions.”

3. Calculations
- No numerical calculation is required; this is a definitional/conceptual question.

4. Why the correct answer is correct
- The phrase “dual selection” implies two parties exercising selective choice; in sexual selection terminology, that maps directly to mutual or biparental mate choice. Empirical examples include species with mutual ornamentation and elaborate courtship by both sexes.

5. Why the other options are incorrect
- “Males compete for access to mates” describes intrasexual selection only, not dual selection.  
- “A mutual agreement between two partners to have sex” is a behavioral description of consent, not an evolutionary selection mechanism.  
- “A group decides who should be allowed to have sex” suggests social or institutional control, not the evolutionary process of mate choice by both sexes.

6. Conclusion
The correct answer is “Males and females both make mate choice decisions,” which matches the provided answer.

Question at position 6 What is dual selection?Males compete for access to matesA mutual agreement between two partners to have sexA group decides who should be allowed to have sexMales and females both make mate choice decisions单项选择题

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