How do you create seedless watermelons? Why don't they invent seedless apples and strawberries?

Question

How about seedless cherries?

Answer 1

specifically you cross a tetraploid (4 copies of genome) with a diploid (2 copies of genome) to get a triploid seed.  The triploid plant can produce flowers and fruit, but in its egg and pollen cells the  chromosomes are not balanced, i.e. after meiosis you get approximately 1.5 genomes per gamete (egg cell or pollen cell).  This does not work, so the seeds abort early in development.

Answer 2

sorry, i dont know the answer.

But i wonder why... seedless watermelons still have the thin white seeds still. There very annoying.

if its seedless they should be completely seedless. holysldkfj.

sorry again.

random thought.

Answer 3

Seedless watermelons are not developed by breeding watermelons with fewer and fewer seeds.

They are developed by crossing two different of melon, each with a different chromosome number.  The resulting plants will grow good melons but are not fertile so they have either no seeds or tiny seeds.

Answer 4

You create them through specialised breeding and hybridization. Say you grow 300 watermelon plants in a field, and you check every watermelon once they ripen up. Choose the few watermelons that seem to have less seeds than the rest, and next year, only plant the seeds from those 2.

Then, choose the plants that seem to have less seeds again, and keep going. Usually, it takes about 10 to 20 plant generations to do something like that.

They don't develop seedless apples or strawberries because no one needs them. You dont eat apple cores (where the seeds are), and on strawberries, you just bite through the seeds, no problem.