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Questions and Answers
Which of the following is a key difference between asexual and sexual reproduction?
Which of the following is a key difference between asexual and sexual reproduction?
- Asexual reproduction is faster and more efficient; sexual reproduction leads to genetic variation. (correct)
- Asexual reproduction involves meiosis; sexual reproduction involves mitosis.
- Asexual reproduction requires two parents; sexual reproduction requires only one parent.
- Asexual reproduction produces genetically diverse offspring; sexual reproduction produces clones.
A gardener discovers that their potato plants are producing new plants from underground stems. Which type of asexual reproduction is this?
A gardener discovers that their potato plants are producing new plants from underground stems. Which type of asexual reproduction is this?
- Parthenogenesis
- Budding
- Fragmentation
- Vegetative reproduction (correct)
In what way does genetic variation benefit organisms that reproduce sexually?
In what way does genetic variation benefit organisms that reproduce sexually?
- It ensures offspring are identical to the parents, preserving successful traits.
- It allows for faster population growth in stable environments.
- It simplifies the reproductive process by eliminating the need for a mate.
- It enhances adaptation to changing environments and allows removal of harmful mutations. (correct)
Starfish can regenerate an entire body from a detached arm. Which type of asexual reproduction does this represent?
Starfish can regenerate an entire body from a detached arm. Which type of asexual reproduction does this represent?
Why might a farmer prefer asexual reproduction over sexual reproduction for a specific crop?
Why might a farmer prefer asexual reproduction over sexual reproduction for a specific crop?
A population of bacteria reproduces asexually. What is the most likely source of genetic variation within this population?
A population of bacteria reproduces asexually. What is the most likely source of genetic variation within this population?
If a harmful mutation arises in an asexually reproducing population, what is the most likely outcome?
If a harmful mutation arises in an asexually reproducing population, what is the most likely outcome?
Many fungi reproduce through spore formation. What is a major advantage of this method of asexual reproduction?
Many fungi reproduce through spore formation. What is a major advantage of this method of asexual reproduction?
Some organisms can switch between asexual and sexual reproduction. Under what conditions might an organism favor sexual reproduction?
Some organisms can switch between asexual and sexual reproduction. Under what conditions might an organism favor sexual reproduction?
Which process contributes LEAST to genetic variation in sexually reproducing organisms?
Which process contributes LEAST to genetic variation in sexually reproducing organisms?
Flashcards
Asexual Reproduction
Asexual Reproduction
Reproduction involving one parent, producing genetically identical offspring.
Sexual Reproduction
Sexual Reproduction
Reproduction involving two parents, producing genetically unique offspring.
Binary Fission
Binary Fission
Asexual reproduction that involves the division of a single cell into two identical cells.
Budding
Budding
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Fragmentation
Fragmentation
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Parthenogenesis
Parthenogenesis
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Vegetative Reproduction
Vegetative Reproduction
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Spore Formation
Spore Formation
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Sources of Genetic Variation
Sources of Genetic Variation
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Alternation of Generations
Alternation of Generations
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Study Notes
- Asexual reproduction involves one parent and offspring are genetically identical to the parent.
- Sexual reproduction involves two parents and offspring are genetically unique.
Differences Between Asexual and Sexual Reproduction
- Asexual reproduction involves mitosis. Sexual reproduction involves meiosis.
- Asexual reproduction results in clones. Sexual reproduction results in diverse offspring.
- Asexual reproduction is faster and more efficient. Sexual reproduction is slower and less efficient.
- Asexual reproduction occurs in unicellular and some multicellular organisms. Sexual reproduction occurs in most multicellular organisms.
Types of Asexual Reproduction
- Binary fission: A single cell divides into two identical cells (e.g., bacteria).
- Budding: A new organism grows out of the parent's body (e.g., yeast, hydra).
- Fragmentation: The parent organism breaks into fragments, each capable of growing into a new individual (e.g., starfish, planarians).
- Parthenogenesis: An egg develops without being fertilized (e.g., some insects, fish, reptiles).
- Vegetative reproduction: New plants grow from parts of the parent plant (e.g., runners, bulbs, tubers).
- Spore formation: Spores develop into new individuals (e.g., fungi, bacteria).
Advantages and Disadvantages of Asexual Reproduction
- Advantages: Rapid population growth, no need for a mate, well-suited to stable environments.
- Disadvantages: Lack of genetic variation, vulnerable to changes in the environment.
Advantages and Disadvantages of Sexual Reproduction
- Advantages: Genetic variation, better adaptation to changing environments, removal of harmful mutations.
- Disadvantages: Slower population growth, need for a mate, more complex process.
Genetic Variation in Reproduction
- Mutations, independent assortment, crossing over, and random fertilization lead to genetic variation in sexually reproducing populations.
- Genetic variation is essential for adaptation and evolution.
Life Cycles of Organisms
- Life cycles vary among organisms.
- Some organisms reproduce asexually, others sexually, and some alternate between both.
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