No, it is not true that the first-born daughter always looks like the female version of her father. Physical traits and characteristics are determined by a combination of genes inherited from both parents. While children may share some physical features with one or both parents, there is no strict rule or pattern that dictates a child's appearance, including their resemblance to a specific parent.
Children inherit genes from both their mother and father, and the combination of these genes can lead to a wide range of appearances. Some children may strongly resemble one parent, while others may have a more balanced mix of features from both parents or look more like other relatives or ancestors.
The idea that the first-born daughter looks like the female version of her father is likely based on anecdotal observations or personal beliefs, rather than scientific evidence. Human genetics is a complex and fascinating field, and the appearance of children is influenced by a multitude of genetic factors that cannot be easily reduced to simple patterns or rules.