Question

У человека ген карликовости доминирует над геном нормального роста. Мужчина нормального роста вступил в брак с женщиной карликового роста, отец которой был нормального роста. Какова вероятность рождения ребенка-карлика в этой семье

Answer 1

А - карликовость
а - нормальный рост

Р: аа * Аа
F1: Aa, aa
50%

Answer 2

Probability of having a dwarf child in this family

In this case, the man has a dominant dwarfism gene, while the woman has a normal height. The woman's father also had a normal height. We want to determine the probability of the couple having a dwarf child.

To calculate the probability, we need to consider the inheritance pattern of the dwarfism gene. If the gene is dominant, as mentioned in the question, a person with just one copy of the gene will exhibit the dwarfism trait. Let's assume that the dwarfism gene is represented by the letter "D," and the normal height gene is represented by the letter "d."

The man, who has a dominant dwarfism gene, can be represented as "Dd." The woman, who has a normal height, can be represented as "dd." The woman's father, who also had a normal height, can be represented as "dd."

To determine the probability of having a dwarf child, we need to consider the possible combinations of the genes from both parents. The possible combinations are as follows:

1. The man passes on the dominant dwarfism gene "D" to the child, and the woman passes on the normal height gene "d." This results in a dwarf child with the genotype "Dd."

2. The man passes on the normal height gene "d" to the child, and the woman also passes on the normal height gene "d." This results in a child with the genotype "dd" and normal height.

Therefore, there is a 50% chance of having a dwarf child in this family.

Please note that this calculation assumes a simple dominant inheritance pattern for the dwarfism gene. In reality, the inheritance of traits can be more complex, and other factors may come into play. It is always recommended to consult with a genetic counselor or healthcare professional for a more accurate assessment of genetic probabilities.