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Question: A Drosophila cross is carried out with a female that is heterozygous for both the y (yellow body) and bb (bobbed bristles) mutations. Both genes are located in the X chromosome. Among 200 male progeny, there were 59 wildtype for both traits, 46 with yellow body, 43 with bobbed bristles, and 52 mutant for both genes. Do these genes show evidence for linkage?
The -10 and -35 sequences in bacterial promoters are separated by about two turns of the DNA double helix (remember genetics?). How do you think transcription would be affected if the deletion were introduced such that the -35 sequence was moved to -..
In order for the 4-nitrophenol to release the yellow colour expected, it has to be fully ionised. With a pKa of 7, I have decided that pH9 will allow it to be fully ionised - this is also supported by yellow colour given off, and a reasonable calib..
Look up the genome size of the following organism: Escherichia coli, Homo sapiens, Zea mays, Li Hum longiflorum, Protopterus aethiopicus.
Genomic DNA from the nematode worm Caenorhabditis elegans is organized through nucleosomes in the manner typical of eukaryotic genomes, with 145 bp encircling each nucleosome and approximately fifty-five bp in linker DNA.
Describe why organisms only reproduce their own kind, and why offspring more closely resemble their parents than unrelated individuals of the similar species.
If amino acid sequences might be useful in determining how closely related dissimilar species are but may not be very useful for identifying a particular species, suggest two reasons why.
An aquatic arthropod known as a Cyclops has antennae that are either smooth or barbed. The allele for barbs is dominant. In the similar organism, resistance to pesticides is a recessive trait.
Each of the following statements Explain a type of column chromatography . Sort the statements to the type of chromatography they describe. If statement can explain all of the types, place that statement in the category.
State the probability (percentage or fraction) of each of following sets of parents generating the given genotypes within their offspring.
Describe what you observed in your cheek smear wet mount, direct stained slide, and indirectly stained slide. What were similarities and differences. Describe what you observed in your yeast wet mount, direct stained slide, and indirectly stained sli..
What will be appearance of the offspring of a cross of the F1 peaches back to that smooth,oval glanded parent. How several diploid Drosophila cells would be needed to have 1 picomole of each allele.
Assume that decomposers were removed from the forest ecosystem; predict what would happen to the rate of nitrogen cycling. Explain the logic behind your prediction.
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