The Mother of These Progeny Resulted from a Cross Between

question 36

Multiple Choice

The mother of these progeny resulted from a cross between two flies from true breeding lines.What are the genotypes of these two lines?

• A)pr pr cn⁺ cn⁺ and pr⁺ pr⁺ cn cn
• B)pr⁺ pr⁺ cn⁺ cn⁺ and pr pr cn cn
• C)pr⁺ pr cn⁺ cn and pr pr cn cn
• D)pr⁺ pr cn cn and pr pr cn⁺ cn
• E)Either pr pr cn⁺ cn⁺ and pr⁺ pr⁺ cn cn or pr⁺ pr⁺ cn⁺ cn⁺ and pr pr cn cn could be true.

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Definitions:

Osteoclast

A type of bone cell that breaks down bone tissue, a process essential for bone remodeling and calcium homeostasis.

Extensive ER

A condition or state where the endoplasmic reticulum, a cellular structure involved in protein and lipid synthesis, is significantly widespread or developed within a cell.

Osteochondral Progenitor Cell

A type of stem cell that has the potential to differentiate into osteoblasts and chondrocytes, contributing to bone and cartilage repair.

Osteoblast

A cell that secretes the matrix for bone formation, involved in the synthesis and mineralization of bone.