In this diagram, the top chromosome is the wild-type chromosome, while the bottom one carries an...
In this diagram, the top chromosome is the wild-type chromosome, while the bottom one carries an inversion. The star is the centromere.
A B C * D E F G
A B F E D * C G
1. During meiosis recombination occurs between the centromere and the region marked "D". Draw out the recombinant gametes showing the gene order and position of the centromeres in each.
2. Are either of the recombinant gametes likely to give rise to viable offspring? Briefly explain why with reference to the chromosome you have drawn.
Homework Answers
After recombination, 2 fragments will be formed, dicentric (containing 2 centromeres) and acentric (containing no centromeres). Both of these fragments are abnormal because a normal fragment has single centromere only. Therefore, both of these fragments will not give rise to a normal gamete.
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