a A new plant species B forms by autopolyploidy from species

a. A new plant species B forms by autopolyploidy from species A,which has a chromosome number of 2n=10. How many chromosomeswould species B have?

b. If species A were to hybridize by allopolyploidy withspecies C (2n=14) and produce a new, fertile species, D, how many chromosomes would species D have?

Solution

a. A new plant species B forms by autopolyploidy from species A,which has a chromosome number of 2n=10. How many chromosomes would species B have?

Answer:

20 chromosomes

Autopolyploids are polyploids with multiple chromosome sets derived from a single species.

Autopolyploids add chromosomal sets from the same species

Species A (2n=10) x Species A (2n=10) ---------->Species B (4n=20)

In the given example Species B has 4n =20 chromosomes

b. If species A were to hybridize by allopolyploidy with species C (2n=14) and produce a new, fertile species, D, how many chromosomes would species D have?

24 chromosomes

Combine chromosomal sets from different species

Species A (2n=10) x Species C (2n=14) ---------->Species B (2n=24)

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