It’s one of the first things that many of us do when we meet someone’s new baby – we instantly begin comparing the little one to mommy and daddy. We can’t help but notice whose eyes are staring back, which parent the baby inherited their hair color from, or who may have passed down their ‘little button nose.’

While this can be a ton of fun, scientists and medical professionals may spoil this guessing game by revealing that there are some traits that are guaranteed to have come from one parent or the other. With a grasp of biology, these experts can pinpoint physical traits and behaviors attributed specifically to mom or dad. Curious who you can thank for your baby blues or your adorable dimples?


The following 11 attributes were handed down from your father:

#1 – Dental Issues

While the jaw structure and teeth of a baby can be traced back to both mom and dad, experts say that the genes from dad are generally the more dominant of the two. This means that, while both parents contribute, you can thank dad’s genes for making the final decision.

#2 – Heart Problems

Experts report that 1 in 5 men carry a gene that increases the risk of coronary heart disease by 50%. This gene is passed down through the genetic information provided by your father, not your mother.

#3 – Lips

Lip structure is a genetic trait that is passed down from generation to generation, including both lip size and structure. With full lips having been identified as a dominant trait, if dad has full lips then the little one likely will as well.

#4 – Eye Color

The determination of a baby’s eye color is an incredibly interesting process, including influences from both mom and dad. Experts say that there are approximately 6 genes with the power to influence eye color, further impacted by the highly dominant (brown) and passive (blue) alleles that play into the deciding factor.

#5 – Height

Both mom and dad have an impact on the baby’s height, but dad’s role shouldn’t be undervalued! If dad is tall, the baby is going to likely be tall (although maybe not quite as tall as dad if mom is short) while a short dad will likely mean the baby is short.


#6 – Infertility

While there are many different factors that may contribute to fertility, research shows that sperm production has a genetic component. If a child is conceived through in vitro fertilization due to a low sperm count, they are more likely to also have a low sperm count as an adult.

#7 – Dimples

Despite the fact that dimples are often loved and admired, they are actually classified as a facial deformity. Regardless of the classification, these adorable little marks are genetic, so if dad has dimples then the baby likely will as well.

#8 – Mental Health Problems

Experts still have a long way to go in their efforts to identify the cause of many of today’s most common mental health struggles, however, research shows that older fathers with ADHD or schizophrenia are 4 times more likely to transfer these conditions to their children due to mutations that occur to DNA with age.

#9 – Fingerprints

One of the most unique aspects of our physical makeup, fingerprints have long been identified as individuals to each of us, with no two fingerprints alike. While the baby isn’t going to inherit dad’s fingerprints, they may inherit some patterns such as swirls or ridges.

#10 – Gender

This may possibly be the most known fact on this list. Mom passes down solely X chromosomes, while dad can pass down either an X or a Y. These chromosomes determined the gender of the baby, with XX resulting in a little girl and XY a little boy. As the mother’s chromosomes are fixed, it is the father who determines the baby’s gender.

#11 – Risky Behavior

Scientists have discovered that there is a gene associated with the need to be a risk taker. This means, if dad was a risk taker then his new little bundle of joy may be wired to also seek out death-defying fun before he or she is even born!

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