Instructions

You have just discovered a new recessive gene in which gives a white shell (w) instead of the wild type color +). You want to know whether this gene is on the same chromosome as another recessive gene you are studying which causes banding on the snail shell (b) instead of the wild type unbanded shell +) You cross a female snail that is heterozygous for both traits to a male snail that has a white, banded shell and obtain the following progeny 3. the snail species Cepea nemoralis Wild type color, unbanded shell Wild type color, banded shell White, unbanded shell White, banded shel 98 150 157 95 a. Are the two genes on the same chromosome? How do you know? b. What is the arrangement of alleles in the female snail? c. How far apart are the two genes?

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