The primrose, Primula kewensis, has 36 chromosomes that are...

The primrose, Primula kewensis, has 36 chromosomes that are similar in appearance to the chromosomes in two related species, $P .$ floribunda $(2 n=18)$ and $P$. verticillata $(2 n=18) .$ How could P. kewensis arise from these species? How would you describe $P$ kewensis in genetic terms?

The primrose, Primula kewensis, has 36 chromosomes that are similar in appearance to the chromosomes in two related species, $P .$ floribunda $(2 n=18)$ and $P$. verticillata $(2 n=18) .$ How could
P. kewensis arise from these species? How would you describe $P$ kewensis in genetic terms?

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Key Concepts

Allopolyploidy

Allopolyploidy is a specific type of polyploidy where the multiple sets of chromosomes originate from different species as a result of hybridization. In genetic terms, an allopolyploid species, such as the one described, arises when interbreeding combines the chromosome sets of two distinct species and subsequent chromosome doubling occurs, stabilizing the hybrid into a new, reproductively isolated species.

Polyploidy

Polyploidy refers to the condition where an organism has more than two complete sets of chromosomes. It is a common occurrence in plants and plays a significant role in their evolution by increasing genetic diversity, potentially leading to new species through doubling of the genome.

Hybridization

Hybridization is the process where two different species interbreed, combining their genetic material to create a hybrid offspring. This is a fundamental concept in evolutionary biology and plant breeding, where the resulting hybrid may display new traits not present in either parent species.

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