science
Grade-10
Easy
Question
The number of chromosomes in parents and offspring remain the same because of ________.
- Chromosomes get doubled during zygote formation
- Reducing of chromosomes in gamete formation
- Chromosome number does not change during meiosis.
- All of the above
Hint:
A diploid zygote if formed by fusion of two haploid gametes.
The correct answer is: Reducing of chromosomes in gamete formation
- For a particular species, the number of chromosomes remain the same
- Gametes or sex cells are produced as a result of meiosis
- Meiosis involves reducing the number of chromosomes by half
- As a result, the gametes are haploid
- During fertilization, a male and a female haploid gametes fuse together to form a diploid zygote
- If the number of chromosomes is not reduced during meiosis, the zygote will be tetraploid which is abnormal
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