Advertisements
Advertisements
Question
Fill the blank circles in figure and identify the sex of child A and B. 
Solution
The circle in the figure can be completed as:
A is a girl. The ovum carrying X-chromosome has been fertilised by a sperm carrying X-chromosome, resulting a zygote with XX combination of sex chromosomes. So, the child born will be a female.
B is a boy. In this case, the X-chromosome carrying ovum has been fertilised by a sperm carrying Y-chromosome. This results in formation of zygote with XY combination of sex chromosomes. So, the child born will be a male.
APPEARS IN
RELATED QUESTIONS
Explain the mechanism of sex determination in birds.
If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?
Both father and mother have the genes Ee in their cells. What colour are their eyes?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
Write a short note on sex determination in man.
There are five daughters and no son in a family. It is because
The belief that the mother is completely responsible for the sex of the child is wrong because the child
How many types of gametes are produced by a human female?
