Final answer:
No, dominant lethal alleles, like the one causing Huntington's disease, can be inherited for more than one generation if the onset of symptoms occurs after reproductive age, allowing the allele to be unknowingly passed on to offspring.
Step-by-step explanation:
The answer to whether dominant embryonic lethal alleles can only be inherited for one generation is 'No'. Dominant lethal alleles are extremely rare due to the lethality factor, but they may not express until an individual reaches adulthood.
A notable example is Huntington's disease, a condition where the nervous system gradually deteriorates. People with one Huntington's allele (Hh) typically do not show symptoms until after potentially having passed the allele to their children. Therefore, these alleles can indeed be transmitted across generations.