Question

Nut cracker No : 29
Date
Starting Time
:
Topic : Sex determination
Duration
: 10 min
Ending Time:
The sex of a baby is determined by the nature of gametes that fuse to form the
zygote.
father frother
sister
Ram
M
JE
This is Mr. Ram's family, Ram can be seen here with his father, mother, and sister. Look
at the picture carefully and answer the following questions:
a) Name the sex chromosome present in Ram's mother and father respectively,
Explain why they are so called?
Roms mother Xx
XY​

Answer 1

Answer:

Ram mom= X

Ram father= X&Y

they are called so because XX determines female pair of choromosomes

when the Y chromosome reaches first to the ovoule for fertilisation then the offspring will have XY combination and it would result to a boy.

similarly if X reaches first then it would be a girl