On the contrary, there is no dimple, which belongs to recessive gene.
For example, if you are divided into the following groups, pregnant parents and pregnant mothers can estimate the probability of dimples after the baby is born. As I said before, dimples are dominant genes, and no dimples are recessive genes. Let A be the dominant gene and A be the potential gene. Get:aa or Aa has dimples, Aa has no dimples.
According to the settings just now, pregnant father and pregnant mother can calculate. According to the following collocation, it is easy for the baby in the belly to have the regularity of dimples.
If both parents have dimples: the baby has a 75% chance of dimples, and the parents: AAAA (both are genetically inherited). The specific situation of the baby is AA, AA, AA, AA. If both prospective parents have dimples, the baby has a 100% chance of dimples.
Prospective parents: AaAa (one of the prospective parents has recessive genes), and the specific conditions of the baby: Aa, AA, AA. With this genetic composition, the probability of dimples after giving birth is 100%, but the probability of recessive genes is 50%.
Prospective parents: Aa, Aa (both prospective parents contain recessive genes), and the specific conditions of the baby are Aa, AA, AA. According to the genetic composition of pregnant parents and pregnant mothers, it can be understood that the probability of having dimples in the future is 75%, and the probability of not having dimples is 25%.
If one of the parents-to-be has dimples and the other does not: 50% of the babies have dimples. Prospective parents: aaaa, Aa, Aa. In that case, the probability that the baby will have dimples in the future is 100%, but the probability that the baby has recessive genes is 100%.
Prospective parents: aaaa, the baby's specific situation is: Aa, Aa, Aa, that genetic component, the conclusion is that 50% of the baby has dimples and 50% has no dimples, but 100% contains recessive genes. If prospective parents don't have dimples, children don't have dimples.
Prospective parents: aaaa, what happens to the baby is: aa, aa, aa. If neither the pregnant father nor the pregnant mother has dimples, then most children are born without dimples. Naturally, in addition to genetic association, dimples are actually related to the advanced degree of facial muscles. These people with less plump smiling muscles and less body fat on their faces are unlikely to have dimples when they smile.
The genetic rules of single eyelid, small eyes and double eyelids are the same as dimples.
Maybe a pregnant mother who is pregnant for 6 weeks will ask, what is the genetic law of double eyelids and single eyelids? In fact, double eyelids are also dominant genetic characteristics, that is, single eyelids and small eyes are recessive genetic characteristics. Expectant fathers and expectant mothers can also infer whether the baby in the belly is a double eyelid or a single eyelid with small eyes according to the genetic law of dimples.