One Drosophila genotype P m/P m is crossed with another genotype p m/p m. If the genes are closely linked

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asked 12 years ago in Biology by anonymous

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In Drosophila, the genes r and s are linked. Flies of genotype r+ s+/ r+ s+ and r s/ r s are crossed and an F1 obtained. The F1 allele arrangement is called

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In Drosophila, the two genes w and sn are X-linked and 25 map units apart. A female fly of genotype w+ sn+/w sn is crossed to a male from a wild-type line. What percentage of male progeny will be w+ sn?

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A plant of genotype C/C;d/d is crossed to c/c;D/D and an F1 testcrossed to c/c;d/d. If the genes are linked and 40 map units apart, the percentage of c/c;d/d recombinants will be

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A plant of genotype C/C; D/D is crossed to c/c; d/d and an F1 testcrossed to c/c;d/d. If the genes are unlinked, the percentage of c/c;d/d recombinants will be

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In Drosophila the recessive alleles for brown and scarlet eyes (resulting from two independent genes) interact so that the double homozygous recessive is white. A pure-breeding brown and pure breeding scarlet are crossed. What proportion of the F2 will be white?

asked 12 years ago in Biology by anonymous