In human beings both females and males have the same number of chromosomes (23 pairs). Females are homogametic with XX chromosomes (22 pairs + XX ). They produce ova having X chromosome. All ova are similar. Males are heterogametic with X and Y-chromosomes (22 pairs +XY). They produce two kinds of sperms, one type with X-chromosome and other with Y-chromosome. On fertilization, the zygotes may have either the XX or XY. The zygote with XX becomes the female and the zygote with XY becomes the male. The sex of the offspring depends on the fertilizing sperm. 
In our society women are blamed for producing female children. Choose the correct answer for the sex-determination in humans.
NEET UG 2013 — Zoology Principles of Inheritance and Variation
2013mcqeasy
In our society women are blamed for producing female children. Choose the correct answer for the sex-determination in humans.
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
Due to some defect like aspermia in man
- B
Due to the genetic make up of the egg
- C
Due to the genetic make up of the particular sperm which fertilizes the egg
- D
Due to some defect in the women
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