LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
12 views
in Biology by (30.0k points)
closed by
The number of chromosomes in parents and offsprings of a particular species remains constant due to ___________.
1. Doubling of chromosomes after zygote formation
2. Halving of chromosomes during gamete formation
3. Doubling of chromosomes after gamete formation  
4. Halving of chromosomes after gamete formation

1 Answer

0 votes
by (54.3k points)
selected by
 
Best answer
Correct Answer - Option 2 : Halving of chromosomes during gamete formation

The correct answer is the Halving of chromosomes during gamete formation.

  • During gamete formation, the number of chromosomes in each gamete is halved due to meiosis. In meiosis, diploid cells form four haploid cells having half number of chromosomes.
  • During gamete formation, there is meiosis in which the mother cell divides into 4 cells having a half number of chromosomes.
  • In fertilization, male and female gametes fuse to form a zygote having the same number of chromosomes as parents. Hence, the number of chromosomes remains constant.
  • The gametes are a special type of cells that contain only half the amount of DNA as compared to normal cells of an organism. So, when a male gamete combines with a female gamete during sexual reproduction, then the new cell 'zygote' will have the normal amount of DNA.
  • The original chromosome number (as in parent) is restored after fertilization in sexual reproduction.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...