male has two chromosomes X and Y, the female has
only X chromosomes. During reproduction if X and X
chromosome come together than the zygote shall
develop into female if X and Y chromosome fuse, then
zygote shall develop into male.
sex of the offspring depends on whether he inherits X
chromosome from father making it XX pair [female child] or
Y chromosome from father making it XY pair [male child].
Facts about Blood Group
if one parent has blood group A and second B, then
offspring may get AB.
one parent = A, second parent =O, then A;
one parent = B, second parent =O, then offspring may get
If one parent = O, second parent =O, then offspring may
one parent = AB, second parent =A/B/O, then offspring may
are 23 chromosomes, 22 autosomes and 1 pair of sex
disorders are Hemophilia [sex
chromosome linked passed from mother to son], Cystic
fibrosis, Sickle-cell anemia [autosomal – can be
passed from any parent to offspring], Color blindness
[sex chromosome linked passed from mother to son, in rare
cases to daughters if father is color blind and mother is
a carrier], Phenylketonuria [autosomal], Thalassemia
[ autosomal ] due to defective genes.
person release IgE antibody and the blood cells release
histamines these cause allergic reactions.
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