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Questions and Answers
What does Mendel's 3rd Law state?
What does Mendel's 3rd Law state?
- Allele pairs separate independently during gamete formation. (correct)
- Organisms show a mixture of parental traits.
- Each inherited trait is defined by a pair of alleles.
- Dominant alleles always mask recessive alleles.
What is the Law of Dominance?
What is the Law of Dominance?
- An organism with alternate forms of an allele will express the form that is dominant. (correct)
- Each inherited trait is defined by a pair of alleles.
- Alleles for different traits separate during meiosis.
- Alleles for different traits are inherited independently.
According to the Law of Segregation, when do parental alleles segregate?
According to the Law of Segregation, when do parental alleles segregate?
- During fertilization
- During DNA replication
- During meiosis (correct)
- During mitosis
Which statement best describes the Principle of Independent Assortment?
Which statement best describes the Principle of Independent Assortment?
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If the genotype is AaBb, which of the following are possible gamete combinations?
If the genotype is AaBb, which of the following are possible gamete combinations?
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Study Notes
Mendel's Laws of Heredity
- Law of Dominance: One allele can be dominant over the other, resulting in its expression in the organism.
- Law of Segregation: Each inherited trait is defined by two alleles, one inherited from each parent, which separate during meiosis.
- Law of Independent Assortment: Alleles for different traits are sorted independently during gamete formation, ensuring that the combination of alleles is random.
Independent Assortment in Genetic Crosses
- In a cross involving two traits, each with two alleles, the possible combinations of alleles are 16 (4 x 4).
- The possible genotypes of offspring are determined by the alleles inherited from each parent.
- The probability of each genotype is determined by the number of possible combinations of alleles.
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