OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Choose the best description of how identical twins form.
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One egg is fertilised by two sperm. The fertilised zygote splits in two before developing into an embryo.
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One sperm fertilises one egg. The zygote divides to form an embryo. The embryo splits in two and each develops into a baby.
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Two sperm and fertilised by two eggs. Each zygote develops into a genetically identical embryo.
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One sperm fertilises one egg. The fertilised zygote splits in two before developing into an embryo.
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Explanation:
Detailed explanation-1: -Several factors for causes of embryo splitting were suggested, including maternal age, prolonged embryo culture, ovarian stimulation, and zona pellucida (ZP) manipulation [6].
Detailed explanation-2: -Fraternal twins (also called dizygotic twins) result from the fertilization of two separate eggs with two different sperm during the same pregnancy.
There is 1 question to complete.