Question

Heterosis is also known as:

• A. Inbreeding depression
• B. Hybrid vigor
• C. Mutation
• D. Genetic drift

Hint:

Heterosis = Hybrid vigor = Superior performance in hybrids

Answer 1

The Correct Option is B

Concept:
Heterosis refers to the phenomenon where hybrid offspring show superior performance compared to their parents.

Step 1: Understanding Heterosis

• Occurs in crossbred individuals.
• Leads to improved traits like growth, fertility, and yield.

Step 2: Meaning of Hybrid Vigor

• Hybrid vigor is another term for heterosis.
• Indicates increased biological performance.

Step 3: Evaluating other options
Inbreeding depression (A)

• Opposite of heterosis
• Causes reduced performance Mutation (C)

• Sudden genetic change
• Not related to hybrid superiority Genetic drift (D)

• Random change in gene frequency
• Occurs in populations Final Conclusion: \[ \boxed{\text{Hybrid vigor}} \]