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Questions and Answers
What is an allele?
What is an allele?
Alternative forms of a gene for each variation of a trait of an organism.
What is crossing over?
What is crossing over?
Exchange of genetic material between nonsister chromatids during prophase I of meiosis; results in new allele combinations.
What does diploid mean?
What does diploid mean?
A cell with two of each kind of chromosome, containing a diploid, or 2n, number of chromosomes.
How is a dominant trait characterized?
How is a dominant trait characterized?
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What is an egg in terms of genetics?
What is an egg in terms of genetics?
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What is fertilization?
What is fertilization?
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What are gametes?
What are gametes?
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What is genetic recombination?
What is genetic recombination?
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What field of study does genetics belong to?
What field of study does genetics belong to?
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What is a genotype?
What is a genotype?
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What does haploid mean?
What does haploid mean?
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What is heredity?
What is heredity?
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What is heterozygous?
What is heterozygous?
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What are homologous chromosomes?
What are homologous chromosomes?
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What does homozygous mean?
What does homozygous mean?
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What is a hybrid organism?
What is a hybrid organism?
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What is the law of independent assortment?
What is the law of independent assortment?
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What is the law of segregation?
What is the law of segregation?
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What is meiosis?
What is meiosis?
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What is nondisjunction?
What is nondisjunction?
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What is phenotype?
What is phenotype?
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What is pollination?
What is pollination?
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What is a recessive trait?
What is a recessive trait?
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What defines sexual reproduction?
What defines sexual reproduction?
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What is sperm?
What is sperm?
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What is a trait?
What is a trait?
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What is a zygote?
What is a zygote?
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Study Notes
Key Terms in Genetics and Meiosis
- Allele: Alternate forms of a gene representing different variations of a trait in an organism.
- Crossing Over: The exchange of genetic material between nonsister chromatids of homologous chromosomes during prophase I of meiosis, resulting in new allele combinations.
- Diploid: A cell containing two sets of chromosomes (2n); has chromosomes in pairs, one from each parent.
- Dominant Trait: A trait that is expressed over a recessive trait when present in an organism.
- Egg: The haploid female sex cell produced through meiosis.
- Fertilization: The process where male and female gametes unite to form a zygote.
- Gamete: Reproductive cells (sperm and eggs) that are haploid, meaning they contain half the number of chromosomes as somatic cells.
Genetic Variability and Principles
- Genetic Recombination: A process that generates genetic diversity among organisms, primarily caused by crossing over and reassortment during meiosis.
- Genetics: The scientific study of heredity and variation in organisms.
- Genotype: The internal genetic makeup of an organism, represented by the combination of alleles.
- Haploid: A cell containing a single set of chromosomes (n), found in gametes.
- Heredity: The transmission of genetic characteristics from parents to offspring.
- Heterozygous: A genetic condition where an organism has two different alleles for a specific trait.
Chromosome Structure and Behavior
- Homologous Chromosomes: Chromosome pairs, one from each parent, that contain the same genes arranged in the same order.
- Homozygous: A genetic condition where an organism has two identical alleles for a specific trait.
- Hybrid: Offspring resulting from the cross of parents with different traits, showcasing diverse genetic backgrounds.
Fundamental Laws of Genetics
- Law of Independent Assortment: A principle stating that genes for separate traits are inherited independently of one another.
- Law of Segregation: A principle explaining that during gamete formation, the allele pairs segregate from each other, leading to different allele combinations in gametes.
Cell Division and Development
- Meiosis: A specialized type of cell division that produces four genetically diverse haploid gametes, crucial for sexual reproduction.
- Nondisjunction: The improper separation of homologous chromosomes during meiosis, leading to gametes with abnormal chromosome numbers.
- Phenotype: The observable physical characteristics of an organism, which are influenced by both genotype and environmental factors.
Reproductive Processes
- Pollination: The transfer of pollen from male to female reproductive structures in plants, typically occurring within the same species.
- Recessive Trait: A trait that can be overshadowed by a dominant trait; expressed only when two recessive alleles are present.
- Sexual Reproduction: The process involving the formation of haploid gametes and their subsequent fusion to create new offspring.
- Sperm: The haploid male sex cell generated through meiosis.
- Trait: An inherited characteristic, which can be categorized as dominant or recessive.
- Zygote: The diploid cell that forms as a result of fertilization, combining genetic material from both parents.
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Description
Explore key concepts of genetics with these flashcards focused on Mendel's principles and meiosis. Each card provides a term along with its definition to enhance your understanding of genetic variations and processes. Perfect for students seeking to master crucial biology concepts.