The absence of small molars in humans is inherited as a dominant (A) autosomal trait. Determine the possible genotypes of the parents if the mother has small molars, but the father does not have them and he is heterozygous for this trait. What is the probability of having children with this anomaly?
1. Genotypes and phenotypes of P: Mother – aa – with small molars, father – Aa – without small molars;
2. Genotypes and phenotypes of the offspring: Aa – without small molars, aa – with small molars;
3. The probability of having children without small molars is 50%.
Answer: mother – aa, father – Aa, the probability of having children is 50.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.