A broad palm with a single palm crease (also known as a "simian crease") is a characteristic physical feature commonly associated with individuals who have Down's syndrome (also known as Trisomy 21). Down's syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21.
The correct option is (D): Down’s syndrome
Example of Non-Mendelian disorder:
Match List - I with List - II.
List - I | List-II | ||
(a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
(b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
(c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
(d) | Evolution by anthropogenic action | (iv) | Darwin Finches |
List - I List - II Choose the correct answer from the options given below.
List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |