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2.Human Reproduction
medium
Fraternal twins in man 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 first two blastomeres separate from each other
C
Egg develops parthenogenetically and first two blastomeres separate from each other
D
Two ova are fertilized simultaneously
Solution
(d)Dizygotic twins are also called fraternal or nonidentical twins, formed by simultaneous fertilization of two different ova by two different sperms.
Standard 12
Biology
