Podcast
Questions and Answers
What type of reproduction requires only one parent?
What type of reproduction requires only one parent?
- Sexual reproduction
- Asexual reproduction (correct)
- Binary fission
- Pollination
What is the role of gametes in sexual reproduction?
What is the role of gametes in sexual reproduction?
- To replicate existing chromosomes
- To provide energy for the offspring
- To combine genetic material from two parents (correct)
- To remove excess genetic material
How many chromosomes does each gamete contain in humans?
How many chromosomes does each gamete contain in humans?
- 46 chromosomes
- 22 chromosomes
- 23 chromosomes (correct)
- 44 chromosomes
What process takes place when an egg and sperm combine?
What process takes place when an egg and sperm combine?
What is a key outcome of meiosis in gametes?
What is a key outcome of meiosis in gametes?
What type of fertilization occurs inside the female body?
What type of fertilization occurs inside the female body?
In sexual reproduction, why are the offspring genetically unique?
In sexual reproduction, why are the offspring genetically unique?
Which statement accurately describes a feature of sexual reproduction compared to asexual reproduction?
Which statement accurately describes a feature of sexual reproduction compared to asexual reproduction?
What is formed when a sperm and egg combine during fertilization?
What is formed when a sperm and egg combine during fertilization?
Which of the following accurately describes meiosis?
Which of the following accurately describes meiosis?
Flashcards
Sexual Reproduction
Sexual Reproduction
A type of reproduction requiring two parents, resulting in genetically unique offspring.
Asexual Reproduction
Asexual Reproduction
A type of reproduction requiring only one parent, resulting in genetically identical offspring.
Gametes
Gametes
Reproductive cells (sperm and egg) containing half the number of chromosomes.
Fertilization
Fertilization
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Meiosis
Meiosis
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Internal Fertilization
Internal Fertilization
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Chromosome
Chromosome
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Offspring
Offspring
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Genetic Material
Genetic Material
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Zygote
Zygote
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Study Notes
Sexual Reproduction
- Reproduction is the creation of offspring.
- Asexual reproduction needs only one parent, creating genetically identical offspring.
- Sexual reproduction needs two parents, producing genetically unique offspring.
- Offspring inherit a mix of genetic material from both parents. Example: dog with one brown ear, one white ear from parents with different ear colors.
Gametes and Fertilization
- Gametes (sperm and egg) are reproductive cells.
- Gametes hold half the organism's genetic material (chromosomes).
- Humans have 46 chromosomes in body cells; gametes have 23.
- Fertilization is the union of egg and sperm, restoring the full chromosome number.
Meiosis
- Meiosis is the cell division process creating gametes.
- Meiosis reduces the chromosome number to half, creating genetic variation in gametes.
- Variation leads to differences in offspring. For example, mismatched ears.
Types of Fertilization
- Internal fertilization occurs within the female body (humans, dogs).
- External fertilization happens outside the body (fish, frogs).
- Internal fertilization leads to development inside the female; external fertilization leads to development outside the parents.
- Example: humans have a gestation period of ~9 months; dogs have a gestation period of about 2 months.
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