Why Do Monozygotic Twins Have Different Phenotypes

question 132

Multiple Choice

Why do monozygotic twins have different phenotypes?

• A) They have different genotypes.
• B) They have nonshared environments.
• C) They have the same environments but different genes.
• D) They have only minor phenotypic variation across a few physical traits but no differences in psychological traits.

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Definitions:

Nonrivalry

A property of goods where one person's consumption does not prevent consumption by others, typically relevant in the context of public goods.

Nonexcludability

Nonexcludability is a feature of public goods where it is not possible to prevent individuals from consuming the good, irrespective of whether they have contributed to its provision.

Public Goods

Goods that are non-excludable and non-rivalrous, meaning no one can be effectively excluded from use and use by one does not reduce availability to others.

Optimal Quantity

The amount of a good or service that yields the highest net benefit to producers and consumers, considering costs and benefits.