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#Question id: 1568


which one of these is not a characteristics  of B-cell?

#XL - S Microbiology
  1. They are APCs

  2. Have surface marker  CD19

  3. B cell convert into plasma cell

  4. Antibodies at surface of b cell – IgM, IgA

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#Question id: 4757

#XL - R Botany

The newborn baby of a mother having blood group O, Rh+ and father having blood group AB, Rh-, got mixed with other babies in the hospital. The baby with which of the following blood groups is not confirmable to be of the said couple?

(i) AB, Rh+                                                    (ii) O, Rh+

(iii) A, Rh+                                         (iv)  B, Rh+

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#Question id: 4758

#XL - R Botany

The allele l in human population is recessive lethal and x chromosome linked. If a female is heterozygous for l allele marries with normal male. What will be interpretation correct?

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#Question id: 4759

#XL - R Botany

which of the following is not a mechanism for sex determination?

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#Question id: 4761

#XL - R Botany

which of the following statements about a lethal allele is not correct?

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#Question id: 4762

#XL - R Botany

a semilethal allele is an example of which of the following extensions of mendelian genetics?

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#Question id: 4763

#XL - R Botany

in a rare blood type referred to as the bombay phenotype, individuals are unable to attach the a or b antigens to their red blood cells. individuals that are homozygous recessive for gene "h" have the bombay phenotype and their blood type is type "o" regardless of their abo genotype. this is an example of what extension of mendelian inheritance?