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Q1. In Drosophila melanogaster, vestigial (short) wings (vg) are caused by a recessive allele of a gene that independently assorts with a gene pair that influences body hair. Hairy (h) results in a hairy body. A cross is made between a fly with normal (wild) wings and a hairy body and a fly with vestigial wings and a normal (wild) body. The phenotypically normal F1 flies were crossed among each other, and 1024 F2 flies were reared. What phenotypes would you expect in the F2, and in what actual numbers (not ratios) would you be expecting to find them?
Q2. Free Response Essay: Describe the process of speciation. Comprise in the discussion the factors that can contribute to the maintenance of genetic isolation. Terms to include; genetic drift, isolation, allopatric, sympatric, natural selection, adaptation, polyploidy, disruptive selection, and any others you think relate.
Recently, use of cleaner fuels has greatly reduced soot in the landscape, and dark-coloured moths have been disappearing. Should the two forms of moths be considered separate species.
A differs from that of the other four species because of simple misalignment, then what should the computer software find when it compares the series of Species A to those of the other four species.
After some week's plants that were transplanted into nonsterile soil exhibited a much higher growth rate compared to the plants transplanted into sterile soil. What would be the most likely explanation for this result.
Describe oxidative and non-oxidative branches of the pentose phosphate pathway and distinguish between these branches in terms of their roles in producing NADPH for biosynthesis reactions or 5-carbon sugar for mucleic acid synthesis.
In the F2 generation, you find that you have 235 flies displaying the wild type phenotype and 765 flies displaying XYZ phenotype. Which phenotype, Wild type or XYZ, is dominant.
How do these duplications arise and what do they propose in terms of mechanisms of transposition. Could you help to understand FEV1/FVC and how the expected percentage of this figure relates to respiratory problems.
If you transform bacteria with the plasmid library made in part b above, divide the transformatnts into 20 aliquots and find one has the insert of interest, now how many clones do you need to screen.
What progeny will result from the cross of blue with blue. Which would yield blue fowl, how must you proceed.
Which of the next statements is untrue of the light reaction in photosynthesis.
Show the lines of current flow to unexcited parts of the cable. Elucidate how these local currents cause the action potential to propagate. A common mistake is to confuse the currents that flow throughout the action potential the voltage-clamp curren..
What fraction of offspring of the cross AabbDd x AaBbdd are expected to have the same phenotype as either one of their parents assume that all three genes are on different chromosomes.
Some wines are marketed as "sparkling" wines. Sparkling wines are considered so because of a dissolved gas that makes them fizzy. Concern what you know about the procedure of respiration to explain the type and origin of this gas.
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