Tag: zoology

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Questions Related to zoology

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

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

  1. Rh$^+$ male and Rh$^-$ female
  2. Rh$^-$ male and Rh$^+$ female
  3. Rh$^+$ male and Rh$^+$ female
  4. Rh$^-$ male and Rh$^-$ female
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice zoology immunity and blood groups compatibility of blood groups blood group blood groups and compatibility advance

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

  1. Rh+ male and Rh- female

  2. Rh+ male and Rh+ female

  3. Rh- male and Rh+ female

  4. Rh- male and Rh- female
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Erythroblastosis foetalis occurs when an Rh-negative mother carries an Rh-positive fetus, leading to the production of anti-Rh antibodies.

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

The problem of erythroblastosis foetalis occurs when 

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Name of the disease due to Rh factor.

  1. Accquired Immuno Deficiency Syndrome

  2. Turner's Syndrome

  3. Erythroblastosis foetalis

  4. Sickle - cell anaemia
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. $Rh^+$ male and $Rh^-$ female
  2. $Rh^-$ male and $Rh^+$ female
  3. $Rh^+$ male and $Rh^+$ female
  4. $Rh^-$ male and $Rh^-$ female.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The risk of erythroblastosis foetalis arises when an Rh-negative mother is sensitized by an Rh-positive fetus.

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

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

  1. $Rh^+$ and mother $Rh^-$
  2. $Rh^+$ and mother $Rh^+$
  3. $Rh^-$ and mother is $Rh^+$
  4. $Rh^-$ and mother $Rh^-$.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Erythroblastosis foetalis occurs when an Rh-negative mother has developed antibodies against Rh-positive blood during a previous pregnancy.

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

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

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The danger exists when the mother is Rh-negative and the fetus is Rh-positive, allowing for potential antibody transfer.

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

The problem due to Rh factor arises when the two blood (Rh${^+}$ and Rh${^-}$ ) mix up

  1. In a test tube

  2. Through transfusion

  3. During pregnancy

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rh incompatibility arises when mother and the baby carries different protein factors. The problem arises when mother is Rh negative and the child she is carrying is Rh positive. This can take place even when two blood groups with different proteins are either mixed in a test tube or transfused into a person. Rh negative people do not have this protein and if Rh positive blood is mixed with Rh negative blood anti Rh antibodies develop which can lead to problems. 

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

In erythroblastosis foetalis, which factors of the mother pass through placenta into the fetus?

  1. Rh antigens

  2. Rh antibodies

  3. ABO antibodies

  4. Agglutinins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Erythroblastosis fetalis also called the hemolytic disease of the newborn, type of anemia in which the red blood cells (erythrocytes) of a fetus are destroyed in a maternal immune reaction resulting from a blood group incompatibility between the fetus and its mother. Symptoms of erythroblastosis fetalis range from mild to severe; death of the fetus or newborn sometimes results.

The Rh system is responsible for the most severe form of the disease, which can occur when a Rh-negative woman (a woman whose blood cells lack the Rh factor) conceives a Rh-positive fetus. Sensitization of the mother’s immune system (immunization) occurs when fetal red blood cells that carry the Rh factor (an antigen in this context) cross the placental barrier and enter the mother’s bloodstream. They stimulate the production of antibodies, some of which pass across the placenta into fetal circulation and lyse, or break apart, the red blood cells of the fetus (hemolysis). Hence option B is correct.

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

Erythroblastosis foetalis is caused when fertilisation takes place between gametes of

  1. $Rh^-$ female and $Rh^+$ male.
  2. $Rh^+$ female and $Rh^-$ male.
  3. $Rh^+$ female and $Rh^+$ male.
  4. $Rh^-$ female and $Rh^-$ male.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
 Erythroblastosis foetalis is caused by transplacental transmission of maternal antibodies to foetal RBCs when  mother is Rh- and the foetus is Rh+.
So, the correct option is 'Rh- female and Rh+ male'