Two homologous human chromosomes have the following structure: --A--B-*-C--D--E-

Question

Two homologous human chromosomes have the following structure:

--A--B-*-C--D--E--F--G--H--I--J--

--A--D--C-*-B--E--F--G--J--I--H

where the letters represent genetic markers and the * represents the centromere.

1. Diagram the two chromosomes as they would be when they synapse during meiosis.

2. Show the resolution products of a reciprocal recombination event between loci C and D.

3. Show the resolution products of a reciprocal recombination event between loci E and F.

4. Show the resolution products of a reciprocal recombination event between loci H and I.

Explanation / Answer

Two homologous human chromosomes have the following structure: - -A - - B - - . C - - D - - E - -F - -G - -H - - I - -J - - - -A - - D - -C - . - B - -E - -F - - G - -J - -I - -H - - Where the letters represent genetic markers and the black dot represents the centromere. 1) Diagram the two chromosomes as they would be when they synapse during meiosis. 2) Show the resolution products of a reciprocal recombination event between loci C and D. 3) Show the resolution products of a reciprocal recombination event between loci E and F. 4) Show the resolution products of a reciprocal recombination event between loci H and I

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