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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?
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12 years
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Biology
by
anonymous
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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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12 years
ago
in
Biology
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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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12 years
ago
in
Biology
by
anonymous
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A female Drosophila supposedly heterozygous for two recessive mutations cn and lz that are on the same arm of the X chromosome (cn lz/+ +) surprisingly expresses both these genes. The male progeny of the female will be
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12 years
ago
in
Biology
by
anonymous
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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
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The F, G and H loci are linked in the order written. There are 30 map units between F and G, and 30 map units between G and H. If a plant F G h/f g H is testcrossed, what proportion of the progeny plants will be f g h/f g h if there is complete interference?
asked
12 years
ago
in
Biology
by
anonymous