In a Dihybrid Cross AAbb * AaBB, What Proportion of the F₂

question 13

Multiple Choice

In a dihybrid cross AAbb * aaBB, what proportion of the F₂ offspring is expected to be homozygotic for at least one gene?

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

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Definitions:

Simple Squamous Epithelium

A single layer of flat cells lining surfaces involved in diffusion and filtration, such as blood vessels and air sacs of lungs.

Endothelium

The layer of cells that lines the heart, blood vessels, and lymphatic vessels, functioning as a selective barrier.

Simple Columnar

Referring to a type of epithelial tissue made up of a single layer of tall, closely packed cells, involved in secretion and absorption.

Digestive Tract

A series of hollow organs joined in a long, twisting tube from the mouth to the anus, through which food is ingested, digested, absorbed, and waste eliminated.