객관식
Which structure fuses to form a diploid zygote during sexual reproduction?
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12. Meiosis
Life Cycle of Sexual Reproducers
객관식
Which of the following statements correctly describes the fusion of gametes during sexual reproduction in most animals?
A
Haploid gametes fuse to produce a diploid zygote.
B
Diploid gametes fuse to produce a diploid zygote.
C
Diploid gametes fuse to produce a haploid zygote.
D
Haploid gametes fuse to produce a haploid zygote.
검증된 단계별 안내1
Understand the key terms: 'haploid' refers to a cell with one set of chromosomes (n), while 'diploid' refers to a cell with two sets of chromosomes (2n). Gametes (sperm and egg) are typically haploid in most animals, while a zygote is diploid.
Recall the process of sexual reproduction: During fertilization, two haploid gametes (one from each parent) fuse to form a single cell called a zygote. This zygote contains two sets of chromosomes, one from each parent, making it diploid.
Eliminate incorrect options: Diploid gametes do not exist in most animals, so any option mentioning 'diploid gametes' can be ruled out. Similarly, a zygote is not haploid, so options mentioning 'haploid zygote' are incorrect.
Focus on the correct description: The fusion of haploid gametes (n) results in a diploid zygote (2n), which is the first cell of the new organism.
Verify the correct answer: The statement 'Haploid gametes fuse to produce a diploid zygote' accurately describes the process of gamete fusion during sexual reproduction in most animals.
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