Is a mutation more likely to be lethal if it impacts early or late stages in development? Explain your answer. What will be an ideal response?
ANSWER: The earlier the expression of a mutation in development, the more likely it is to be lethal.
Events in early stages of development have impacts on large portions of anatomy and stages
of development, thus a small mutation could have a very major impact. On the other hand,
later-acting mutations are more apt to impact a small aspect of the fetus and therefore are less
likely to be lethal.
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