Question

3. In a dihybrid cross between two F1 individuals exhibiting complete linkage, what would you expect?

     A) one parental allele combination occurring more frequently than another

     B) two equally frequent gametes containing only parental allele combinations

     C) only recombinant gametes

     D) one parental allele combination occurring more frequently than another and no recombinant gametes

Answer 1

In a dihybrid cross between two F1 individuals exhibiting complete linkage, the expected result is-

B) two equally frequent gametes containing only parental allele combinations

A cross between two organisms involving two genes is called a dihybrid cross. A greater number of gamete types (four) is produced when two genes are considered.

During complete linkage both the genes are completely linked and 0% recombinant is found. In this case only parental types are found.

If the genes described are carried on separate chromosomes, the genes are unlinked, and will therefore sort independently of each other during meiosis.

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