Answer for question 7. -CE·L 50% 1 1 :05 AM //online.vitalsource.com P and pheno

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Answer for question 7.

-CE·L 50% 1 1 :05 AM //online.vitalsource.com P and phenotypes) would you mate to determine the order of the body color, wing size, and eye color genes on the chromosome? 7. Assume that genes A and B are on the same chromosome and are 50 map units apart. An animal heterozygous at both loci is crossed with one that is homozygous recessive at both loci. What percentage of the offspring will show recombinant phenotypes resulting from crossovers? Without knowing these genes are on the same chromosome, how would you interpret the results of this cross? 8. Two genes of a flower, one controlling blue (B) versus white (b) petals and the other controlling round (R) versus oval (r) stamens, are linked and are 10 map units apart. You cross a homozygous blue oval plant with a homozygous white round plant. The resulting F1 progeny are crossed with

Explanation / Answer

The maximum recombination frequency occurs between two genes is 49%. If two genes are 50 map units means the number of recombinant offspring produced would be equal to the number of offspring with the parental phenotypes. These genes would appear to assort independently and may mistakenly be thought to be located on different chromosomes because they are far enough apart on their chromosome that linkage is not observed in genetic crosses. So, the ratio of the cross is 1:1:1:1

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