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introductory video: since its discovery in 1953, dna has revolutionized the study of evolutionary relationships. darwin didnt know about dna. he couldnt explain how traits were passed from one generation to the next—he just knew that they were. were darwin alive today, hed no doubt be astonished at how much we can learn about the natural world without even leaving the lab. before you start the first level in this mission, \frog legs and fish eggs,\ watch the introductory video and answer questions 1 - 5 below. 1. for a mutation to affect evolution, it must: a. provide a benefit to the organism b. involve more than one chromosome c. be able to get passed from parent or offspring d. be neutral—neither help nor harm the organism
Evolution is a long - term process that occurs over generations. For a mutation to contribute to evolution, it needs to be heritable. If a mutation cannot be passed from parents to offspring (or vice - versa in some cases like in asexual reproduction where the parent is also the offspring in a sense), it cannot accumulate in a population over time and thus cannot drive evolutionary change.
Option a: A mutation doesn't have to be beneficial immediately. Harmful mutations can sometimes become neutral or beneficial in a changing environment, and neutral mutations can also be part of evolutionary processes (e.g., through genetic drift).
Option b: A mutation doesn't need to involve more than one chromosome. Single - gene mutations (which are on a single chromosome) can have significant evolutionary impacts.
Option d: A mutation doesn't have to be neutral. Beneficial and harmful mutations (that can be passed on) can also drive evolution. For example, a beneficial mutation can give an organism a selective advantage and increase in frequency in the population over time.
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C. Be able to get passed from parent or offspring