GeneticsLesson 1 of 2 in the course The Cellular Basis of Inheritance

Sexual Reproduction: Genetic Variation and Life-Cycle Patterns

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Sexual reproduction can be slower and more demanding than asexual reproduction, yet it is widespread among eukaryotes. This lesson explores the trade-offs between these reproductive strategies and how genetic variation can help populations persist.

Asexual reproduction can occur through processes such as budding, fragmentation, or asexual eggs. It does not require a mate, so an organism can avoid the time and energy involved in finding or attracting one. In asexual populations, every individual can produce offspring. Under the simplified assumption that half of a sexual population does not directly produce offspring, an asexual population could grow twice as fast in theory.

All flashcards

What is genetic variation?
Differences in genetic makeup among individuals in a population.
Why are mutations important to genetic variation?
Mutations are the ultimate source of new genetic differences.
What is the Red Queen hypothesis?
Species may need to keep adapting in response to other evolving species to maintain their position.
What is coevolution?
Evolutionary change in interacting species in response to one another.
What is alternation of generations?
A life cycle with both multicellular haploid and diploid stages.

Quiz questions

  1. What is one direct reproductive advantage of asexual reproduction?Answer: An individual can reproduce without finding or attracting a mate.
  2. What is the ultimate source of new genetic differences?Answer: Mutation
  3. What does coevolution describe?Answer: Interacting species evolving in response to one another.
  4. What characterizes a diploid-dominant life cycle?Answer: The multicellular organism is diploid, and its haploid cells are gametes.
  5. What does the Red Queen hypothesis emphasize?Answer: Ongoing adaptation in response to other evolving species.

Based on Concepts of Biology by Samantha Fowler, Rebecca Roush, James Wise (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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