So at N1, the first backcross, you will select mice that have one allele that is B6 and the other has to be the null allele, which is on a 129 background.
32.
After some experimentation in the late 1970s, stocking in the Great Lakes and, especially, in Georgian Bay, was converted entirely to the so-called lake trout backcross in the early 1980s.
33.
The backcross is the result of an F1 splake male being crossed with a female lake trout ( " i . e . ", 75 % lake trout and 25 % brook trout ).
34.
Failure of " P . lutzii " to backcross with " P . sitchensis " ( Gordon 1988 ) contention that backcrossing with several spruce hybrids was proving much less successful than expected.
35.
Although the backcross program did succeed in creating some localised angling opportunities, it never achieved any degree of success in terms of natural reproduction the backcross was only marginally better at reproducing than was the F1 splake.
36.
Although the backcross program did succeed in creating some localised angling opportunities, it never achieved any degree of success in terms of natural reproduction the backcross was only marginally better at reproducing than was the F1 splake.
37.
On the other hand, if hybrids are vigorous but cannot backcross with parent populations, the result is hybrid speciation, which, aside from the contribution of new hybrids, evolves independently of its parent types.
38.
The recombination frequency is more difficult to compute in an F2 cross than a backcross, but the lack of fit between observed and expected numbers of progeny in the above table indicate it is less than 50 %.
39.
While it is possible to predict the genetic composition of a backcross " on average ", it is not possible to accurately predict the composition of a particular backcrossed individual, due to random segregation of chromosomes.
40.
The registry has a cross-breeding program under which Chinooks are bred to individuals of other breeds thought to have contributed to Chinook development; fourth-generation backcross descendants of such crosses may be accepted as UKC purebred Chinooks if they meet the Chinook Owner Association's Cross Breeding Program requirements.
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