Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and beauty - The husband has a single eyelid, the wife has a double eyelid, the first child is a girl with a single eyelid, and another child has a double eyelid.
The husband has a single eyelid, the wife has a double eyelid, the first child is a girl with a single eyelid, and another child has a double eyelid.
"A couple's husband has double eyelids, his wife has single eyelids, and the first child has single eyelids", indicating that the single eyelid is recessive, the double eyelids are dominant, and the father's genetic component is heterozygote. The gene map is as follows: "Later, my wife underwent plastic surgery and became a double eyelid", which is a variation caused by environmental factors, and the genes controlling eyelid traits have not changed ... From the gene map, "If they have a second child"