In X-linked recessive inheritance, an affected mother has two defective X chromosomes and will pass one defective X chromosome to all her sons. Since males inherit only one X chromosome, they will always express the trait if they inherit the defective gene. Females are less frequently affected because they require two copies of the defective gene to show the trait.
LIST I (Condition) | LIST II (Characteristics) |
---|---|
A. Color blindness | I. Insensitivity to green and red light |
B. Hemophilia B | II. Deficiency of clotting factor IX |
C. Hemophilia A | III. Deficiency of clotting factor VIII |
D. G-6-PD deficiency | IV. Severe anemic condition |
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: