It is called 'blossom end rot' or BER - quite common and there is a FAQ here on it as well as several discussions that a search using those terms will pull up for you.

Dave

Sorry forgot about part 2 of the question. Any cross pollination won't show in the fruit this year, only in fruit grown next year from the seeds you saved this year. Those seeds could revert to either of the parent stock or produce any sort of crossed effect but only 2 genes would be reflected.

Overly simplistic, but to effect 3 genetic changes you would need at least 3 generations of crosses - the crossed stock of the first 2 would have to be crossed with the third type and so on. And even then it would depend on which was the dominant or recessive gene as to which characteristics would take.

An easy way to think of it is that you are a hybrid of 2 parents who each had 2 parents, etc. but your brother is also a hybrid of the same 2 parents as you are and look how he turned out. :^)

Dave

Dave, I love your example using people...
My brothers were better looking than me... hmmmmm

Shot

Lol. I don't have any siblings, but I know what you mean. Thanks for the info!

Abby