Questions and Answers
What is a dominant trait?
Dominant trait
What does it mean if a person does not have Huntington disease?
They don't have Huntington disease
What is a recessive gene?
Recessive
What does it mean that a trait is in the minority?
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What does it indicate when both parents do not have hitchhiker's thumb?
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What does the term 'by the shade' refer to?
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What is the significance of IV-1 and IV-3 in a pedigree?
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Are 'IV-1' and 'IV-3' the parents in a pedigree?
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What is the designation for female in a pedigree?
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How can you infer that a person's father and mother had colorblindness?
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What does 'the female gene' refer to?
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Study Notes
Genetic Terms and Definitions
- Key genetic vocabulary is essential for understanding inheritance patterns.
- Dominant trait refers to a characteristic that is expressed when at least one dominant allele is present.
- Recessive trait is expressed only when two recessive alleles are present, representing traits that are in the minority in a population.
- Individuals with a recessive trait may not express the condition unless they inherit the recessive alleles from both parents.
Family Pedigree Insights
- Family pedigree charts help track genetic conditions and inheritance patterns in families.
- Individuals without Huntington disease are likely carriers of normal alleles, emphasizing the importance of generational tracking.
- Those who do not possess hitchhiker's thumb demonstrate a dominant allele influencing this trait.
Colorblindness Inheritance
- Colorblindness is a recessive trait typically transmitted through female carriers to male offspring.
- Both parents must carry the allele for colorblindness for it to manifest in their children.
Generational Notation
- Individuals in pedigrees are referred to by Roman numerals, representing different generations.
- For instance, IV-1 and IV-3 indicate specific members of the fourth generation in a pedigree chart.
Gender Identification in Pedigrees
- Identifying the gender of individuals within pedigrees is crucial for understanding inheritance, with females usually represented by circles.
- Family relationships are defined by siblings rather than parents in certain contexts, clarifying familial structure.
Summary of Characteristics
- Collectively, these definitions and insights provide a foundation for genetic study and understanding hereditary conditions.
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Description
Test your knowledge of essential genetics vocabulary with this flashcard quiz. Each card presents a term related to heredity and traits, along with their definitions. Perfect for students studying genetics or anyone interested in understanding complex genetic concepts.
