Use the Following Information to Answer the Question

question 26

Multiple Choice

Use the following information to answer the question.
A plantlike organism on the planet Pandora can have three recessive genetic traits: bluish leaves, due to an allele (a) of gene A; a feathered stem, due to an allele (b) of gene B; and hollow roots due to an allele (c) of gene C. The three genes are linked and recombine.
A geneticist performed a testcross with an organism that had been found to be heterozygous for the three recessive traits, and she was able to identify progeny of the following phenotypic distribution (+ = wild type) :

Which of the progeny phenotypes will require recombination between genes A and B?

• A) 1, 2, 5, and 6
• B) 1, 3, 6, and 7
• C) 2, 4, 5, and 8
• D) 2, 3, 5, and 7

---

Definitions:

Stratified Squamous Epithelium

A type of epithelial tissue composed of several layers of flat cells, designed to protect underlying tissues.

Gap Junction

Small channel between cells that allows the passage of ions and small molecules between cells; provides means of intercellular communication.

Hemidesmosomes

Structures that anchor cells to the underlying basement membrane, facilitating cell stability and structural integrity.

Tight Junction

Cell junctions in epithelial or endothelial cellular sheets that prevent the passage of molecules and ions between the cells.