Question

В семье праворуких родителей родился сын левша. Определите генотипы родителей и остальных детей если известно что леворукость-это рецессивный признак.

Answer 1

А - праворукость (доминантный признак)

а - леворукость (рециссивный признак)

Нам известно, что от праворуких родителей родился левша, следовательно оба родителя гетерозиготны по данному признаку. Их генотипы - Аа

 

    А     а

А АА   Аа

а Аа   аа

 

Остальные дети могут иметь генотипы АА (праворукий, гомозиготный), Аа (праворукий, геторизоготный) и аа (левша)

Answer 2

Determining the Genotypes of the Parents and Other Children in a Family with Right-Handed Parents and a Left-Handed Son

In a family with right-handed parents and a left-handed son, we can determine the genotypes of the parents and other children based on the information that left-handedness is a recessive trait.

Genotypes: - Let's use "R" to represent the dominant allele for right-handedness and "r" to represent the recessive allele for left-handedness. - The parents are right-handed, so they could be either homozygous dominant (RR) or heterozygous (Rr). - The left-handed son is homozygous recessive (rr).

Genotypes of the Parents and Other Children

1. Parents: - The genotypes of the parents could be either RR or Rr. - Since the left-handedness trait is recessive, the parents must have at least one dominant allele (R) to be right-handed. - Therefore, the possible genotypes for the parents are RR (homozygous dominant) or Rr (heterozygous).

2. Other Children: - If the parents have the genotypes RR and Rr, the Punnett square can be used to determine the genotypes of the other children. - If both parents are RR, all the children will be Rr (heterozygous). - If one parent is RR and the other is Rr, there is a 50% chance of the children being RR and a 50% chance of them being Rr.

Conclusion

Based on the information provided, the genotypes of the parents could be either RR (homozygous dominant) or Rr (heterozygous), and the genotypes of the other children will depend on the genotypes of the parents.

It's important to note that the determination of genotypes in a real-world scenario would involve a more detailed analysis, including the consideration of other genetic factors and inheritance patterns.