Over the past half century, there has been a trend in the united states and other developed countries for people to marry and start families later in life than did their parents and grandparents. what effects might this trend have on the incidence (frequency) of late-acting dominant lethal alleles in the population?

The late marriage trend in developed countries have affected the late acting lethal alleles in a population because it causes diseased carrying genes in offspring.

Explanation:

The trend of getting married at a late age and starting family after that has been seen in many developed countries especially USA.  However, it has a negative impact on the dominant alleles in the population. Marrying at a late age causes genetic disorders or diseases in offspring of humans.

It also causes the chances of having less number of babies. Older parents are more prone to having Huntington’s disease which causes people to have less children.

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