What type of polyploid (allotriploid, allotetraploid, etc.) would result from a

Question

What type of polyploid (allotriploid, allotetraploid, etc.) would result from a cross between bread wheat and einkorn wheat? (See photo)
A) autotriploid B) autotetraploid C) allotetraploid D) autopentaploid E) allopentaploid
I omitted allotriploid because it was incorrect. Please explain, thank you! Einkorn wheat (Triticum uratu) Wild grass Aegilops speltoides or related species) Genome AA (2n = 14) Genome BB (2n 14) Gametes F1 generation Hybrid Genome A B (2n 14) nondisjunction Emmer wheat (Triticum turgidum) Wild grass Aegilops tauschii) Genome AA BB (An 28) Genome DD (2n- 14) F2 generation |||Hybrid Genome ABD (3n 21) Bread wheat (Triticum aestivum) Genome AA BB DD (6n 42) Figure 8.29 Genetics: A Conceptual Approach, Fifth Edition © 2014 W. H. Freeman and Company

Explanation / Answer

E) allotetrataploid

since there is no allohexaploid option (more correct answer should be allohexaploid because genome is AA BB DD 6n=42)

because Polyploidy may also result from doubling of chromosome number of F1 hybrid which is derived from two distinctly different species. This will bring two sets of chromosomes in F1 hybrid.

Let A represent a set of chromosome ( = genome = a complete set of genes present in a haploid set of chromosomes) in species X, and let B represent another genome in a species Y.

The F1 then will have one A genome and another B genome.

The doubling of chromosome in this F1 hybrid (AB) will give rise to a tetraploid with two A and two B genomes. Such a polyploid is called an allopolyploid or amphidiploid (form derived from a hybrid between two diploids, so that the homologues come from different sources).

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