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The Drosophila genes for white eyes (w), tan body (t) and vestigial wings (vg) lie at map positions 2, 22, and 52 respectively. Out of 500 progeny, 21 exhibited double crossovers. What is the degree of interference?
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12 years
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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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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
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Out of 800 progeny of a three-point testcross there were 24 double crossover recombinants, whereas 30 had been expected on the basis of no interference. The interference is
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