A trihybrid (Aa, Bb, Rr) is test crossed and produces the following numbers of offspring with...
A trihybrid (Aa, Bb, Rr) is test crossed and produces the following numbers of offspring with the indicated genotypes:
Aa, bb, rr 50
Aa, bb, Rr 150
aa, Bb, rr 150
aa, Bb, Rr 50
For the trihybrid parent, draw the chromosome(s) of a single cell
of meiosis where crossing-over has NOT occurred
between any of the loci. Mark each chromatid for each locus and the
allele that it carries.
Homework Answers
The crossing over is not found between any of the genes. Hence single cross overs are not found.
In this case, the greater number are of parental type. Whereas the lowest number are of double cross over type. The middle gene is swapped betwee the homologous chromosomes during the double Cross over.
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