A person who is trisomic for twenty first pair of chromosomes is
Klinefelter's syndrome
Down's syndrome
Turner's syndrome
None of these
Turner's syndrome in human is caused by
Choose correct answer.
$(i)$ Sickle - cell anaemia is controlled by three pairs of allele.
$(ii)$ Trisomy is chromosomal disorder.
$(iii)$ $47$ chromosome present in person whose having Turner's syndrome.
Match List $I$ with List $II$ : Choose the correct answer from the options given below :
List $I$ | List $II$ |
$A.$ Down's syndrome | $I.$ $11^{th}$ chromosome |
$B.$ $\alpha -$Thalassemia | $II.$ $X$ chromosome |
$C.$ $\beta -$Thalassemia | $III.$ $21^{st}$ chromosome |
$D.$ Klinefelter's syndrome | $IV.$ $16^{th}$ chromosome |
Identify the disease on basis of following characters.
$(1)$ Short statured with small round head.
$(2)$ Furrowed tongue and partially open month.
$(3)$ Palm is broad with characteristic palm crease.
The recessive genes located on $X$-chromosome in humans are always