Question

of
ory
Cycle keeps on repeating with regularity.
*(10) Gender of child is determined by the male
partner of couple. Explain with reasons whether
this statement is true or false.
Father
Mother
(Sperms)
(oocytes)
in
lic
30
(22+ X) or (22+ Y)
(22 + X)
le
ng
d
daughter (44 + XX)
Son (44 + XY)
le
e
r
f
Fig. 3.11 : Sex determination in Human being.
Ans.(1) The statement Gender of child is determined
by the male partner of couple is true.
(2) It is clearly seen from the diagram that there
are two types of sperms produced by males. One
sperm has a X chromosome while the other has a Y
chromosome, apart from autosomes. The mother on
the other hand has all X bearing oocytes. Thus the
sperm that fertilizes the oocyte decides the sex of the
child
(3) If X bearing sperm fertilizes the oocyte,
daughter is born and when Y bearing sperm fertilizes
the oocyte, son is born.
(4) Thus father or male partner is responsible for
the determination of the sex.
f
f
S
IVING ORGANISMS : PART - 2
71​

Answer 1

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