Ecosystems — BIOLOGY STD 12 Science — Question

List $I$ $(syndrome)$

$(1)$ Patau’s syndrome

$(2)$ Kline-Felter’s syndrome

$(3)$ Down’s syndrome

$(4)$ Turner’s syndrome

List $II$ $(Chromosomal\, abnormality)$

$(A)$ $44 + XXY = 47$

$(B)$ $44 + X = 45$

$(C)$ $46 + 1 = 47$, Chromosome $13^{th}$

$(D)$ $46 + 1 = 47$, Chromosome $21^{st}$ Code

$I.$ Communication was not easy

$II.$ Concept of factors which did not blend was not accepted

$III.$ Use of mathematics to explain biological problem was unacceptable

$IV.$ He could not provide any physical proof for the existence of factors Choose the right combination

Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.