The maize genes sh and bz are linked, 40 map units apart. If a plant sh+ bz/sh bz+ is selfed, what proportion of the progeny will be sh bz/sh bz?

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asked 12 years ago in Biology by anonymous

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asked 12 years ago in Biology by anonymous

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asked 12 years ago in Biology by anonymous

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In maize, two plants that are both heterozygous for the recessive alleles a and b are crossed. What frequency of double-mutant progeny will appear if a and b are 7.2 map units apart and both parents carry a and b in trans?

asked 12 years ago in Biology by anonymous

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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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Genes ho and dp are 9.0 map units apart, and genes dp and da are 26.3 map units apart. What is the probability of a double crossover in these regions?

asked 12 years ago in Biology by anonymous