Question

A zygote which has an X - chromosome inherited from the father will develop into 
1. girl
2. boy
3. either boy or girl
4. X - chromosome does not influence the sex of a child.

Answer 1

Correct Answer - Option 1 : girl

The correct answer is girl.

    

• There are XX Chromosomes in females and XY Chromosomes in males.
• The male chromosome decides the sex of the zygote which develops into young ones.
• When X-Chromosome inherited from the father it develops into a girl.
• When Y- Chromosome inherited from the father it develops into a boy.  

 

• Chromosomes are generally first discovered by Walther Flemming in 1882.
• Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.
• Each chromosome is made of DNA( Deoxyribose nucleic acid) and protein, which is passed from parents to offspring.
• In humans, 23pairs of chromosomes are found i.e. 46 in numbers.
• 22 pairs of chromosomes are called autosomes, look the same in both males and females.
• The 23rd pair of chromosomes is called sex chromosomes, which differ between males and females.
• They play a vital role in cell division, heredity, variation, mutation, repair and regeneration.