You are interested in a new type of autosomal dominant mutation that gives purple eyes in Drosophila. You have a true-breeding purple-eyed line carrying a mutation that you call pr-1. You have isolated a second purple-eyed mutation that you call pr-2, which you have established in a true-breeding line that also carries a recessive marker st, which gives stubby legs. You cross a fly from the pr-1 line to a fly from the st, pr-2 line producing F1 females which you then cross to males from a true breeding st line (normal eyes). From this cross, 1000 progeny flies can be categorized into four different phenotypic classes:

                   

What is the phenotype of a pr-1 pr-2 double mutant?

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#Question id: 23898

#Unit 13. Methods in Biology

In the human genome, one centimorgan or a 1 percent recombination frequency represents, on average, a distance of about

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#Question id: 3284

#Unit 11. Evolution and Behavior

The fitness of three genotype are A1A1 < A1A2 = A2A2) Which of the following observation correct?

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#Question id: 10425

#Unit 6. System Physiology – Plant

Very low fluence responses such as 0.0001 µmol m–2 reach a maximum at about 0.05 µmol m–2, on these fluence rate red light induce phytochrome responses. Which of the following is not the phytochrome responses on VLFR

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#Question id: 11872

#General Aptitude

The greatest number of four digits which when divided by 3, 5, 7, 9 leave remainders 1, 3, 5, 7 respectively is

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#Question id: 23249

#Unit 13. Methods in Biology

Which enzyme converts the PPi to ATP in Pyrosequencing?