Suppose That in Corn Some Alleles Result in Higher Yield

question 247

Multiple Choice

Suppose that in corn some alleles result in higher yield, but only in the heterozygous state (Aa has higher yield than either AA or aa) .If different homozygous strains of corn each have different deleterious alleles, hybrids will likely to exhibit _______, as explained by the _______ hypothesis.

• A) epistasis; dominance
• B) epistasis; overdominance
• C) heterosis; dominance
• D) heterosis; overdominance
• E) codominance; dominance

---

Definitions:

Securely Attached

An attachment category describing babies who typically show distress on separation from the mother in the strange situation test, but who greet her happily on her return, usually seeking comfort by reaching to be picked up. Once reassured, they tend to return to exploring. In Bartholomew’s description of adult attachment categories, describes individuals who expect others to be available and supportive of their needs in close relationships, who are comfortable with emotional closeness, but are also reasonably autonomous.

Self-Concept

An individual's perception of themselves, including beliefs, feelings, and thoughts about one's abilities, appearance, and values.

Cognitive Development

The process by which individuals acquire and develop the ability to think, understand, and reason over time.

Social Referencing

A baby’s adjustment of its reactions to objects or events based on feedback provided by a caregiver. For example, a baby may look at a caregiver’s facial expression before approaching a new toy.