Question

Женщина с 1 группой крови,резус отрицательный вышла замуж за гетерозиготного мужчину,резус положительный с 3 группой крови.Определите генотип и фенотип детей,вероятность рождения детей с 1 группой крови,резус положительный

Answer 1

Дано

ген     признак

ОО   1 группа крови 

BО   3 группа 

Rh+  положительный резус фактор

rh -    отрицательный резус фактор

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Определите генотип и фенотип детей,вероятность рождения детей с 1 группой крови,резус положительный?

 

РЕШЕНИЕ

 

Р                 ООrh-rh-      х         ВОRh+Rh+ 

 

G                      Оrh-                  ВRh+    ОRh+ 

 

F1       ВОRh+rh-                     ООRh+ Оrh-                  

 

Ответ:  ВОRh+rh- ,  ООRh+ Оrh-  ----- генотипы

              3гр,+                 1гр +           ----- фенотипы

 

вероятность рождения детей с 1 группой крови,резус положительный? (50%)

 

 

Answer 2

Determining Genotype and Phenotype of Children

A woman with blood type 1 (A) and Rh-negative has married a man who is heterozygous for Rh-positive and has blood type 3 (B). Let's determine the possible genotypes and phenotypes of their children, as well as the probability of having children with blood type 1 and Rh-positive.

The woman's genotype is IAi (heterozygous for A) and her phenotype is blood type A, Rh-negative. The man's genotype is IBi (heterozygous for B) and his phenotype is blood type B, Rh-positive.

When these genotypes are crossed, the possible genotypes of their children are: - IAIB (blood type AB) - IAi (blood type A) - IBi (blood type B) - ii (blood type O)

The phenotypes of their children would be: - 25% chance of having blood type AB, Rh-positive - 25% chance of having blood type A, Rh-negative - 25% chance of having blood type B, Rh-positive - 25% chance of having blood type O, Rh-negative

Probability of Children with Blood Type 1, Rh-Positive

The probability of having children with blood type 1 (A) and Rh-positive can be calculated from the possible genotypes. Since the genotype IAi (blood type A) can be crossed with IBi (blood type B), the possible genotypes of their children include IAIB (blood type AB) and IAi (blood type A).

Therefore, the probability of having children with blood type 1 (A) and Rh-positive is 25% (from the genotype IAIB).

In summary, the couple has a 25% chance of having children with blood type 1 (A) and Rh-positive.