Bissoy.com
Doctors Medicines MCQs Q&A

  1. X from father and Y from mother
  2. Y from father and X from mother
  3. Y from father and Y from mother
  4. X from father and X from mother
4 views

1 Answers

Option 4 : X from father and X from mother

The correct answer is X from father and X from mother.

  • The sex of the child is determined by the father's chromosomes.

 

  • The sex-determining mechanism in humans is the XY type. Humans contain 23 pairs of chromosomes.
  • 22 pairs of chromosomes are the same in both males and females, which are called autosomes.
  • The 23rd pair is different in both sexes and is known as the sex chromosome.
  • Females have a pair of X chromosomes and males have X and Y chromosomes as sex chromosomes. 

 

  • In humans, the females have XX sex chromosomes while the males have XY chromosomes.
  • When the X chromosome of a female unites with the X chromosome of a male, a girl will be born and when the X chromosome of females unites with the Y chromosome of a male, a boy will be born.
  • Thus, the sex chromosome of males (father) determines the sex of the child.​

Mother/Father

X

Y

X

XX (Daughter)

XY(Son)

X

XX(Daughter)

XY(Son)

[ alt="61dfb16be917eeb727aff986 16451050677021" src="//storage.googleapis.com/tb-img/production/22/02/61dfb16be917eeb727aff986_16451050677021.png" style="height: 330px; width: 350px;">

4 views

Related Questions