Questions and Answers
What represents the ratio of offspring when parents that are heterozygous for having freckles (dominant) are crossed?
Which type of scientific statement is universally accepted to be true due to consistent observation?
law
What is a gene?
a segment of DNA that is the basic unit of heredity
What were the flower colors of the offspring from crossing purebred purple flowering plants (PP) with purebred white flowering plants (pp)?
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Which law or principle of inheritance is represented by the diagram?
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What summarizes the law of segregation?
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Why did Mendel study pea plants?
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The law of independent assortment states that gametes carry one allele for each trait.
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What can be known about Mendel's five-part hypothesis?
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When plants that are heterozygous for round seeds are crossed, what is the probability that the offspring will have wrinkled seeds?
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Study Notes
Laws of Inheritance
- Heterozygous parents for freckles (dominant trait) produce offspring with a 75% probability of having freckles.
- Scientific laws are statements of fact that are universally accepted and consistently observed.
Genetics Fundamentals
- A gene is defined as a segment of DNA that serves as the basic unit of heredity.
- Mendel's experiment with purebred purple (PP) and white (pp) flowering plants resulted in 100% purple offspring.
Mendelian Principles
- The principle of segregation is represented in Mendel's experiments, indicating that gametes carry one allele for each trait.
- The law of segregation summarizes that each gamete contains only one allele for each inherited trait.
Mendel’s Methodology
- Mendel chose pea plants for his studies due to their sexual reproduction and the ease of observing various traits.
- The law of independent assortment does not define the concept that gametes carry one allele for each trait.
Research and Outcomes
- Mendel's five-part hypothesis is a research-based answer to scientific questions concerning inheritance.
- When heterozygous round-seeded plants are crossed, there is a 25% probability for their offspring to have wrinkled seeds.
Studying That Suits You
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Description
Test your understanding of the laws of inheritance with these flashcards from Biology B. Explore genetic concepts such as dominant traits and scientific laws. Perfect for students looking to reinforce their knowledge in genetics.
