Question

Which scenario breaks the law of segregation?

A. A gamete contains the father's allele.
B. The gametes produced each have 1 allele after meiosis II.
C. A gamete produced has 2 of the same alleles after meiosis II.
D. The gamete fertilized has the dominant trait.

Answer 1

Option C, where a gamete has 2 of the same alleles after meiosis II, breaks the law of segregation as each gamete should only contain one allele for each gene.

Step-by-step explanation:

According to Mendel's law of segregation, during the formation of gametes, the alleles for each gene must segregate from each other so that each gamete carries only one allele for each gene. The scenario that breaks this law would be when a gamete produced has 2 of the same alleles after meiosis II, as stated in option C. This would result in a violation of the segregation principle because, normally, after meiosis II, each gamete should have just one allele for each gene — either inherited from the mother or the father. Therefore, option C, not the other choices, presents a scenario that contradicts the law of segregation.