Question

Which of the following can lead to the development of brothers?

• A. One zygote
• B. Two zygotes
• C. Without zygote
• D. Gamete

Hint:

Identical twins are the result of one zygote splitting into two embryos, whereas fraternal twins come from two separate zygotes.

Answer 1

The Correct Option is A

Step 1: Understand the concept of zygote formation.
In the context of human reproduction, brothers can develop from a single fertilized egg (zygote) that splits into two embryos. This process is known as monozygotic twinning or identical twins.
Step 2: Analyze the options.
- One zygote: If a single zygote divides into two embryos, identical brothers can develop. - Two zygotes: This would result in fraternal twins, not identical brothers. - Without zygote: Development without a zygote is not possible for human reproduction. - Gamete: A gamete is an un-fertilized cell (sperm or egg) and cannot develop into a human alone.
Step 3: Conclusion.
The development of brothers from one zygote is the correct answer.
Final Answer: \[ \boxed{One \; zygote} \]