The Barr body is the inactivated X chromosome in females, visible as a dense structure within the nucleus. This condensation ensures dosage compensation between males (with one active X chromosome) and females (with two X chromosomes). The inactive X chromosome is highly condensed and transcriptionally silent, contrasting with the active X chromosome.
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: