Q. 53.7( 3 Votes )

In human beings, the statistical probability of getting either a male or female child is 50 : 50. Give a suitable explanation.

Answer :

Human beings have 23 pairs of chromosomes. The 22 pairs are called autosomes are similar in males and females. The two chromosomes (23rd pair) that determine the sex of the unborn baby are called sex chromosomes named X chromosomes and Y chromosomes.


A female has two X chromosomes (22+XX), while a male has one X and one Y chromosome(22+XY). The gametes (egg and sperm) have only one set of chromosomes. Thus, all the gametes produced by females have only the X chromosome (22+ X) while male produced two types of gametes, half gametes have X chromosomes (22+X) and half gametes have Y chromosomes (22+Y).


Therefore, the possibility of fertilization of egg (22 + X) with the sperm having (22 + X) chromosome to have girl child is 50%. Likewise, there is 50% possibility that egg is fertilized with sperm carrying (22 +Y) chromosome to have male child.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Evolution of Humans9 mins
Interactive Quiz: Interesting facts on evolution of Geometry42 mins
Idioms and Phrases43 mins
Goprep Genius Quiz | Analogy and Classification48 mins
Acid - Types and Nomenclature52 mins
Agriculture and its Importance35 mins
Foundation | Permutation and Combination45 mins
Metaphor and Simile41 mins
Champ Quiz | Electrical Power and Heating31 mins
Surface Area and Volume49 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses