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Can a baby look like another man?

Published in Genetics 2 mins read

A baby can indeed resemble another man, even if that man is not the biological father. While the baby's genetic makeup is determined solely by the biological father, the resemblance is a matter of chance and how dominant certain genes are. It's a common misconception that babies always inherit features directly from their parents.

Factors contributing to resemblance:

  • Genetics: While the baby inherits half of its DNA from the biological father, the other half comes from the mother. The baby's appearance is a combination of both parents' genes.
  • Dominant Genes: Certain traits, like eye color or hair color, can be more dominant than others. A baby might inherit a dominant gene from either parent, even if the other parent doesn't express that trait.
  • Chance: The combination of genes that a baby inherits is ultimately random. Even with the same parents, siblings can have vastly different appearances.

Examples:

  • A baby might have the same eye color as its uncle, even though its father has a different eye color.
  • A baby might have a similar nose shape to its mother's grandfather, even though neither the mother nor the father shares this trait.

It's important to remember that while a baby might resemble someone else, this doesn't necessarily mean that person is the biological father. DNA testing is the only way to determine paternity with certainty.

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