Mendelian Genetics

AP Biology· difficulty 3/5

The cytological basis of Mendel's law of segregation is

  • A

    Separation of homologous chromosomes during anaphase I of meiosis

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  • B

    Semiconservative replication of DNA prior to entry into S phase

  • C

    Random fusion of sperm and egg cells during cross-fertilization events

  • D

    Separation of sister chromatids during anaphase of mitotic division

Explanation

Each homolog (carrying one allele of each gene) goes to a different pole during anaphase I — alleles segregate.

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