Question 2 Suppose that, at the time a human zygote is undergoing cleavage, the first two blastomeres that form separate

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Question 2 Suppose That At The Time A Human Zygote Is Undergoing Cleavage The First Two Blastomeres That Form Separate 1 (32.6 KiB) Viewed 10 times

Question 2 Suppose that, at the time a human zygote is undergoing cleavage, the first two blastomeres that form separate from each other completely. Both of the blastomeres and their cellular descendants continue to divide on schedule, on the prescribed developmental program. The result is identical twins or two normal, genetically individuals. By contrast, non-identical twins form when two different secondary oocytes are fertilized at the same time by two different sperm. Based on this information, explain why non-identical (fraternal) twins show considerable genetic variability and identical twins do not. The liver from a healthy non-identical twin donor is rejected by his twin sibling after the transplant. Discuss the reason why. Compare and contrast the fertilization in human and plants.