What are the effects -if any- of new marriage trends on the frequency of dominant lethal alleles?

by Kelli
(CA)

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. Speculate on the effects this trend may have on the incidence (frequency) of late-acting dominant lethal alleles in the population.

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