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Question: In Drosophila, the map positions of genes are given in map units numbering from one end of a chromosome to the other. The X chromosome of Drosophila is 66 m.u.. long. The X-linked gene for body color-with two alleles, y + for gray body and y for yellow body-resides at one end of the chromosome at map position 0.0. A nearby locus for eye color, with alleles w + for red eye and w for white eye, is located at map position 1.5. A third X-linked gene, controlling bristle form, with f + for normal bristles and f for forked bristles, is located at map position 56.7. Each gene resides on the X chromosome, and at each locus the wild-type allele is dominant over the mutant allele. Predict the frequency of yellow with white eyes and forked bristles progeny type produced by this mating.
Albinism is a condition that results from the lack of normal pigmentation. In humans, individuals with two recessive alleles at ALBINO (aa) locus are albino.
A man with hemophilia marries a woman whose family has no record of hemophilia. Their first child is a son. The couple is worried that their son may have inherited hemophilia. What are the chances of a hemophilic son.
Discuss why is even weak selection still stronger than drift in very large populations at non-neutral loci?
Industrial melanism refers to the dark pigmentation that evolved in some insects giving them protective coloration on vegetation darkened by soot in heavily industrialized areas prior to air pollution regulation.
How, at what time the shoot tip touched the other plant's stem did the shoot switch from growing straight to growing in a spiral? Write down a hypothesis first.
A drug that does not dissociate has a molecular weight of 300. If 300 g of this drug are dissolved in 1000 ml of water, what is the osmolarity of resulting solution?
In ward's Ap biology lab 7 (the drosophila lab) describe the parental cross you received; use genetic symbols. Depict a punnett square to show how the possible allelic combinations for this gene in the F1 generation.
Look up the genome size of the following organism: Escherichia coli, Homo sapiens, Zea mays, Li Hum longiflorum, Protopterus aethiopicus.
Twenty g soil sample was added to 80 ml of water to make the final volume of 100 ml (tube A). Then, ten ml of the ‘tube A' solution was taken and added to 90 ml of water.
A gas takes up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1140 mm Hg, what is the new volume of the gas.
Represent an arrow pointing away from each circle that represents food for another circle - and point the arrow towards the "eater's" circle. Some circles will have several arrows pointing towards hem and away from them. Illustrate an X in the circle..
Assume y ou are studying a gene, and its effects on skin cells. You want to find out if the protein made encoded by this gene binds to DNA in a particular place
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