Question

which statement about polyploidy is true? allopolyploids are hybrid plants that result from the mating of two closely related species. tetraploid and diploid plants of a given species can mate to produce viable triploid offspring. tetraploid plants can mate with other tetraploid plants of the same species complex, but not with themselves. polyploid plants are usually less vigorous than diploid plants of the same species complex. it is rare in plants.

Explanation:

Allopolyploids are formed by the hybridization of two closely - related species followed by chromosome doubling. Triploid offspring from tetraploid - diploid matings are often sterile due to problems in meiosis. Tetraploid plants can self - mate. Polyploid plants are often more vigorous than diploid ones in the same species complex, and polyploidy is common in plants.

Answer:

Allopolyploids are hybrid plants that result from the mating of two closely related species.