Research reveals father is 250,000 years older than mother

Research reveals father is 250,000 years older than mother

Scientists have discovered a new way to identify the average age at which males and females were reproduced throughout human evolutionary history.

By studying DNA mutations in modern humans, they discovered a window that can be traced back 250,000 years.

“Through my research on modern humans, I realized that the types of DNA mutations humans leave in their offspring can predict the age at which a child will be born.” To tell Study co-author Matthew Hahn, a genomicist at Indiana University Bloomington, said:

“We then applied this model to human ancestors to determine at what age they gave birth.”

They found that over the past 250,000 years, the average age at which humans gave birth was 26.9. (For context, about 300,000 years ago is also when our species first appeared.)

average clever person father was always older than average clever person Men become parents at 30.7 years old, compared to 23.2 years for women.

However, the age gap has narrowed over the past 5,000 years, the researchers added, adding that the study’s latest estimate puts the average age at women become parents Currently 28 years old. The trend seems to be driven primarily by older women with children, they suggest.

However, aside from the recent rise in maternal age, this study found remarkable consistency in the average age of new parents throughout our species. However, the team reports that there has been no steady increase since prehistoric times.

The average age of conception appears to have fallen about 10,000 years ago, roughly coinciding with the emergence of agriculture and the dawn of civilization, which researchers say may be related to rapid population growth at the time. increase.

The recorded history goes back only a few thousand years at most, making it difficult to glean such broad population-level information from archaeological evidence alone.

But our ancestral secrets also lurk within each of us today, and that’s how Hahn and his colleagues came across methods for determining parental age in the past.

A new study captures findings about de novo mutations. This is a DNA change that manifests itself in one family member, occurring spontaneously rather than being inherited through the family tree.

While working on another project involving these New genetic alterations and parents of known agethe researchers noticed an interesting pattern. Based on data from thousands of children, the pattern and number of new mutations formed in a parent before being passed on to the child depend on each parent’s age of conception.

This allowed researchers to estimate separate generation times for males and females over 250,000 years.

“These mutations from the past have accumulated generation after generation and are present in humans today.” To tell Co-author of the paper, Richard Wang, a phylogeneticist at Indiana University, said:

“We can now identify these mutations and see how they differ between male and female parents and how they change as a function of parental age.”

Previous studies have also used genetic cues to estimate generation length, but they usually rely on comparisons of modern DNA with ancient samples, and between males and females and over the past 40,000 to 40,000 years. Researchers note that it has been averaged over 45,000 years.

“Human history is pieced together from a variety of sources, including records, archaeological finds and fossils.” To tell.

“Our genome, the DNA found in all our cells, provides a kind of manuscript of human evolutionary history.

“The findings from our genetic analysis not only confirm some things we knew from other sources, but also give us a deeper understanding of the demographics of the ancients.”

This research scientific progress.

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