Tag: blood group

Questions Related to blood group

One intern calculated the concentration of $O _2$ in blood as 0.0025 ml/ml of blood. Considering atmospheric pressure as 760 mmHg, how much approx. $O _2$ tension could have been in the blood?

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. 40mmHg

  2. 60mmHg

  3. 80mmHg

  4. 100mmHg

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Correct Option: A

Choose the correct answer from the alternatives given.
Which of the following is an example of codominance?

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. Pink flowers of snapdragon

  2. The ABO blood groups in humans

  3. Sex-linkage in humans

  4. None of these

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Correct Option: B
Explanation:
  • Pink flowers of Snapdragon is a heterozygote phenotype and an intermediate phenotype of the two homozygous phenotypes from which it originates. It is an example of incomplete dominance.
  • Codominance is seen when both the alleles are expressed simultaneously and neither of the alleles is dominant over the other. In human ABO blood grouping system both the alleles I$^A$ and I$^B$ are codominant and hence in the AB blood group individuals both the antigens, A and B are seen. So, the human ABO blood grouping is an example of codominance.
  • The expression of the sex chromosomes in humans differ in males and females and hence are said to be sex-linked.
So, the correct option is 'The ABO blood groups in humans'.

If the mother is $Rh^{-ve}$ and father is $Rh^{+ve}$, which of the following $Rh^{+ve}$ child is normally not affected?

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  1. First

  2. Second

  3. Male child

  4. Female child

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Correct Option: A
Explanation:

Rh incompatibility usually isn't a problem if it's the mother's first pregnancy because, unless there's some sort of abnormality, the fetus's blood does not normally enter the mother's circulatory system during the course of the pregnancy. However, during second child, the mother's and baby's blood can intermingle. If this happens, the mother's body recognizes the Rh protein as a foreign substance and might begin making antibodies (protein molecules in the immune system that recognize, and later work to destroy foreign substances) against the Rh proteins. Rh antibodies are harmless until the mother's second or later pregnancies. If she is ever carrying another Rh-positive child, her Rh antibodies will recognize the Rh proteins on the surface of the baby's blood cells as foreign, and pass into the baby's bloodstream and attack those cells. This can lead to swelling and rupture of the baby's RBCs. A baby's blood count can get dangerously low when this condition, known as a haemolytic or Rh disease of the newborn, happens.

Therefore, the correct answer is option B.

Which one of the following couple were suggested by doctors to not have more than one child?

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. Rh$^+$ male and Rh$^-$ female

  2. Rh$^-$ male and Rh$^+$ female

  3. Rh$^+$ male and Rh$^+$ female

  4. Rh$^-$ male and Rh$^-$ female

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Correct Option: A
Explanation:
Rh incompatibility occurs when a Rh- negative mother is impregnated by a Rh- positive father. The result can be Rh- positive baby. In such a case, the baby’s Rh antigens will be recognized as foreign invaders. The mother’s blood cells attack the baby’s as a protective mechanism and can cause erythroblastosis fetalis. If the mother is pregnant with her first baby, Rh incompatibility is not as much of a concern. However, when the Rh- positive child is born, the mother’s body creates antibodies against the Rh factor, which will attack the blood cells if she becomes pregnant with another Rh- positive baby.
Hence, the correct answer is option A.

Biological marriage of one of the following should be avoided
                                                 or

After examining the blood groups of a couple, the doctor advised them not to have more than one child. The blood group of the couple are likely to be

                                                or

In which of the following situations, is there a risk factor for children of incurring erythroblastosis foetalis

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. Rh+ male and Rh- female

  2. Rh+ male and Rh+ female

  3. Rh- male and Rh+ female

  4. Rh- male and Rh- female

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Correct Option: A

The problem of erythroblastosis foetalis occurs when 

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. Both father and mother are Rh positive

  2. Both father and mother are Rh negative

  3. Mother is Rh positive and father is Rh negative

  4. Father is Rh positive and mother is Rh negative

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Correct Option: D
Explanation:

If a woman who is Rh- negative married to a man who is Rh- positive produces a baby may have Rh- positive blood, inherited from the father. Rh antibodies are harmless until the mother's second or later pregnancies. If she is ever carrying another Rh- positive child, her Rh antibodies will recognize the Rh proteins on the surface of the baby's blood cells as foreign and attack those cells. This can lead to rupture of the baby's RBCs known as haemolytic or Rh disease of the newborn or erythroblastosis foetalis. 

Therefore, the correct answer is option D.

Name of the disease due to Rh factor.

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  1. Accquired Immuno Deficiency Syndrome

  2. Turner's Syndrome

  3. Erythroblastosis foetalis

  4. Sickle - cell anaemia

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Correct Option: C
Explanation:

When a woman is pregnant having Rh negative blood group and the blood group of the foetus is Rh positive, then her baby's blood type will be incompatible with her own. This can cause a condition known as erythroblastosis fetalis, where the mother's red blood cells attack those of the baby as there would any foreign invaders. Rh incompatibility and ABO incompatibility are the two main cause. Both are associated with blood type. Thus, the correct answer is option C.

A doctor suggested to a couple not to have more than one child because of

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. $Rh^+$ male and $Rh^-$ female

  2. $Rh^-$ male and $Rh^+$ female

  3. $Rh^+$ male and $Rh^+$ female

  4. $Rh^-$ male and $Rh^-$ female.

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Correct Option: A

Chances of erythroblastosis foetalis occurring during second pregnancy when the baby is

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. $Rh^+$ and mother $Rh^-$

  2. $Rh^+$ and mother $Rh^+$

  3. $Rh^-$ and mother is $Rh^+$

  4. $Rh^-$ and mother $Rh^-$.

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Correct Option: A

If a women becomes pregnant second time, the foetus is in danger when

zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

  1. Mother is Rh (+) ve and foetus is Rh (-) ve

  2. Mother is Rh (-) ve and foetus is Rh (+) ve

  3. Father is Rh (-) ve and foetus is Rh (+) ve

  4. Father is Rh (+) ve and foetus is Rh (-) ve.

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Correct Option: B