Questions: 3. Which is TRUE according to Mendel's Law of Segregation? (A) Allele pairs separate in gamete formation (B) Gene pairs become unlinked during gamete formation (C) The laws of probability determine gamete formation (D) There is a 50% chance that a gamete will get a dominant allele 4. According to the Law of Independent Assortment, how many different kinds of gametes can normally be produced by an organism with the genotype RrYy? (A) 1 (B) 2 (C) 3 (D) 4

3. Which is TRUE according to Mendel's Law of Segregation? (A) Allele pairs separate in gamete formation (B) Gene pairs become unlinked during gamete formation (C) The laws of probability determine gamete formation (D) There is a 50% chance that a gamete will get a dominant allele 4. According to the Law of Independent Assortment, how many different kinds of gametes can normally be produced by an organism with the genotype RrYy? (A) 1 (B) 2 (C) 3 (D) 4
Transcript text: 3. Which is TRUE according to Mendel's Law of Segregation? (A) Allele pairs separate in gamete formation (B) Gene pairs become unlinked during gamete formation (C) The laws of probability determine gamete formation (D) There is a $50 \%$ chance that a gamete will get a dominant allele 4. According to the Law of Independent Assortment, how many different kinds of gametes can normally be produced by an organism with the genotype RrYy? (A) 1 (B) 2 (C) 3 (D) 4
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Solution

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  1. The answer is (A): Allele pairs separate in gamete formation.

Explanation:

  • (A) Allele pairs separate in gamete formation: This is true according to Mendel's Law of Segregation, which states that during the formation of gametes, the two alleles for a trait separate so that each gamete receives only one allele.
  • (B) Gene pairs become unlinked during gamete formation: This is not accurate in the context of the Law of Segregation. The law specifically addresses the separation of alleles, not the unliking of gene pairs.
  • (C) The laws of probability determine gamete formation: While probability plays a role in predicting the distribution of alleles, this statement does not accurately describe the Law of Segregation.
  • (D) There is a $50 \%$ chance that a gamete will get a dominant allele: This is not a general statement of the Law of Segregation. The law states that alleles segregate, but the probability of a gamete receiving a specific allele depends on the genotype of the organism.
  1. The answer is (D): 4

Explanation:

  • An organism with the genotype RrYy can produce gametes with different combinations of alleles due to the Law of Independent Assortment, which states that alleles of different genes assort independently of one another during gamete formation.
  • The possible gametes are: RY, Ry, rY, and ry. Therefore, there are 4 different kinds of gametes that can be produced.
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