In a Dihybrid Cross for Which the Parental Cross Is

question 117

Multiple Choice

In a dihybrid cross for which the parental cross is AABB × aabb,what proportion of F₂ offspring will be heterozygous for both genes? Assume independent assortment.

• A) 1/4
• B) 1/2
• C) 3/4
• D) All are heterozygotes.
• E) None are heterozygotes.

---

Definitions:

Sister Chromatids

Identical copies of a chromosome connected by a centromere, formed during the S phase of cell division.

Cell Cycle

The series of phases that a cell goes through from its formation to its division into two daughter cells.

Plant Cells

The basic structural and functional units of plants, distinguished by their rigid cell walls, chloroplasts, and large central vacuoles.

Animal Cells

Basic units of life in organisms of the kingdom Animalia, characterized by lacking cell walls and having a nucleus and other specialized organelles.