(D) Fraternal twins,also known as dizygotic twins,are produced when two separate ova are released from the ovaries and are fertilized by two different

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Two ova are fertilized simultaneously

(D) Fraternal twins,also known as dizygotic twins,are produced when two separate ova are released from the ovaries and are fertilized by two different sperms simultaneously. This results in two distinct zygotes,each developing into an individual with a unique genetic makeup.

Class 12 Biology Human Reproduction Fertilisation and Implantation

Medium

Fraternal twins in humans are produced when:

A
Two sperms fertilize an ovum and the first two blastomeres separate from each other
B
One sperm fertilizes an ovum and the first two blastomeres separate from each other
C
An egg develops parthenogenetically and the first two blastomeres separate from each other
D
Two ova are fertilized simultaneously