In descending generations (t = 1002 to t = 1006), the animals had 1000 offspring produced by random sampling with replacement among the parents selected from the previous generation.
Apart from being an achievement of great economic interest, the synthesis of A. proylei is a unique example of interspecific hybridization in insects, which, in spite of a great disparity in the chromosome numbers of parental species, has been successfully maintained internationally in the descending generations (Jolly et al., 1973).
What I might call my special insight into this truth is that I have discovered, I believe, that this one-in three rule is generational - that is, each descending generation can, and on the whole does, eliminate one of these three.
The plants he used in these crosses were true-breeding for flower colour, meaning that the purple-flowered plants were descended for generations from only other purple-flowered plants, and that the white-flowered plants were likewise descended for generations from only other white-flowered plants.
For people in Carroll Gardens, though, the arrival of Mr. Padolecchia, who is directly descended, 33 generations hence, from Marco Polo's brother, is a little bit like the arrival of history itself.
He was born in Burnley, descended from generations of mill and chapel folk who regarded the southern establishment with suspicion and whose hard and mostly penurious lives he described in loving detail in A Lancashire Family Inheritance (1996).
I know a strong sermon from a weak one because I am descended from generations of preachers and evangelists, dating back to my great-grandfather, the Rev. Frank Patterson, a Methodist in late 19th-century Virginia.
It is not permissible to go around bragging that your family came over on the Mayflower and that you are descended from generations of Throgmorton-Winthrops who bequeathed a legacy of good breeding and fine manners.
Everybody's a preppy when all it takes now to achieve the appearance of having descended from generations of Groton men is a flipped collar, a pair of Top-Siders and checkered shorts.
In fact, she is descended from generations of Spanish botanists and growers in Mexico.
Ramsay Weston Phipps descended from generations of military and political men.
