Question

question 5

which of the following characteristics is a heritable trait that exhibits continuous variation?

height
scarring
widows peak
straight thumb

Explanation:

Define continuous variation and heritability

Continuous variation refers to traits that show a range of phenotypes (e.g., height) rather than distinct categories, often controlled by multiple genes and environmental factors. A heritable trait is one that is passed from parents to offspring through genetic material.

Analyze the given options

• Height: Heritable and shows continuous numerical variation (e.g., 158 cm, 185 cm).
• Scarring: Acquired environmental characteristic, not heritable.
• Widow's peak: Heritable but exhibits discontinuous variation (either "Yes" or "No").
• Straight thumb: Heritable but exhibits discontinuous variation (either "Yes" or "No").

Select the correct characteristic

Height is the only listed characteristic that is both genetically heritable and exhibits a continuous range of values.

Answer:

• Height (Correct answer)
• Scarring
• Widow's peak
• Straight thumb