Hexaploid Wheat Was Produced Synthetically by He and Coworkers

question 21

Multiple Choice

Hexaploid wheat was produced synthetically by He and coworkers. They mated the diploid species, Aegilops tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

• A) Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication, and T. turgidum contributed two chromosomes.
• B) Aegilops tauschii contributed two chromosomes, and T. turgidum contributed four chromosomes.
• C) Each parent contributed equally to the genome of the offspring.
• D) The hexaploid number appeared following mitosis with no subsequent cell division.

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Definitions:

Renal Medulla

The inner region of the kidney, comprised of renal pyramids and involved in the concentration of urine.

Peritoneal Membrane

A serous membrane that forms the lining of the abdominal cavity or the peritoneum, involved in protecting abdominal organs.

Abdominopelvic Cavity

An anatomical space comprising the abdominal and pelvic cavities, containing vital organs including the stomach, liver, intestines, and reproductive structures.

Nitrogenous Waste

Waste products that contain nitrogen, such as urea or ammonia, which are produced by the breakdown of proteins and nucleic acids in the body.