The important things to remember are that chromosomes as well as genes occur in ...$A$.... The two alleles of a gene pair are located on homologous sites on ...$B$... chromosomes

Choose the correct choice for $A$ and $B$

  • A

    $A$-single, $B$-analogous

  • B

    $A$-pair, $B$-analogous

  • C

    $A$-pair, $B$-homozygous

  • D

    $A$-single, $B$-heterozygous

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