Question

Why the offspring of tobacco plant have double amount of chromosome than parent plant?

Answer 1

Polyploids with odd numbers of chromosome sets are sterile or highly infertile, because their gametes and offspring are aneuploid. Autotetraploids arise by the doubling of a 2n complement to 4n. ... This method works in both plant and animal cells, but generally plants seem to be much more tolerant of polyploidy.

Answer 2

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➡Male and female gametes of a species have same number of chromosomes. Hence, number of chromosome in the female gamete of tobacco plants is 24. Zygote is formed by fusion of male and female gamete, it will have 48 chromosomes