Haemophilia $A$ is due to the absence of

  • A
    Antihaemophilic globulin
  • B
    Calcium
  • C
    Plasma thromboplastin
  • D
    $X$ chromosome

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Similar Questions

$A$: The heterozygotic female for haemophilia may transmit the disease to sons.
$R$: Such traits show criss-cross inheritance.

Colour blindness is

The genes $HBA1$ and $HBA2$ associated with alpha-thalassemia are located on which chromosome in humans?

$A$ color-blind girl is rarely born. This occurs only when:

$A$ - Sickle-cell anaemia is a sex-linked recessive trait.
$R$ - This disease is controlled by more than two pairs of alleles.

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