Hexaploid Wheat Was Produced Synthetically by He and Co-Workers

question 5

Multiple Choice

Hexaploid wheat was produced synthetically by He and co-workers. They mated the diploid species, A. 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) Each parent contributed equally to the genome of the offspring.
• B) Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication, and T. turgidum contributed two chromosomes.
• C) Aegilops tauschii contributed two sets of chromosomes, and T. turgidum contributed four sets of chromosomes.
• D) The hexaploid number appeared following mitosis with no subsequent cell division.

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