Flower Diameter in Sunflowers Is a Quantitative Trait

question 23

Multiple Choice

Flower diameter in sunflowers is a quantitative trait. A plant with 6-cm flowers, from a highly inbred strain, is crossed to a plant with 30-cm flowers, also from a highly inbred strain. The F₁ have 18-cm flowers. F₁ × F₁ crosses yield F₂ plants with flowers ranging from 6 to 30 cm in diameter, in approximately 4-cm intervals (6, 10, 14, 18, 22, 26, 30) . An 18-cm F₁ plant is crossed to a 6-cm plant. What is the probability of an offspring with one additive allele, if all genes that influence this trait are unlinked?

• A) 1/3
• B) 1/4
• C) 1/6
• D) 3/8
• E) 1/16

---

Definitions:

Northern European Rulers

Refers to the monarchs and leaders who governed the various kingdoms, principalities, and empires of Northern Europe throughout history.

Illusionism

The art technique of depicting images so realistically that they create the optical illusion of being three-dimensional.

French Manuscript Painting

The art of decorating handwritten books with miniature paintings, particularly flourishing in France during the medieval period.

Dynastic Symbol

A symbol representing a specific dynasty or lineage, often used to legitimize power and heritage.