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Species A is 2n = 8, and species B is 2n = 10. Pollen from species...

Species A is 2n = 8, and species B is 2n = 10. Pollen from species A manages to fertilize an ovum from species B. Assuming that the gametes were normal, which of the following statements about the hybrid plant that is formed is true?

Answer options:

a. During meiosis in the hybrid plant, the chromosomes from species A will pair with each other (species A chromosomes will pair other species A chromosomes), but the species B chromosomes won't all be able to form pairs.

b. The hybrid plant has 9 chromosomes.

c. The hybrid plant is an aneuploid.

d. The hybrid plant is an autopolyploid.

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Homework Answers

Answer #1

Option B

​​​​​First option is incorrect because none of the chromosomes from any species will pair with themselves. It is because the gamete contains one copy of a pair of homologous chromosome and therefore there is no pairing partner for any of these chromosomes.

Second option is correct as per the given diagram.

Third option is incorrect because there is no information about any deletion or insertion of chromosomes in the question. The number of chromosomes in the hybrid will be 9. It will be sterile because species having odd number of chromosomes are sterile.

Last option is incorrect because the species is diploid and not polyploid.

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