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In tomatoes, the three mutant traits, dwarfness, green flesh, and white flowers, are due to the homozygous recessive state of the genes d, gf, and wf (respectively). A dwarf, green-fleshed, white-flowered plant is crossed as the pollen parent to the homozygous normal plant.
a. Diagram the cross, using the forked-line method, to determine the F2 phenotypic ratio. Include phenotypes with the appropriate expected ratios.
b. If the F1 were testcrossed, what would be the expected phenotypic and expected genotypic ratios?
People who live at high altitudes often have a high red blood cell count, a condition called polycythaemia. Explain the cause of the polycythaemia and its possible benefit. Do you think it could have adverse effects? Explain!
In German cockroaches, curved wing (cv) is recessive to normal wing (cv+). Bill, who is raising cockroaches in his dorm room finds that the frequency of the gene for curved wings in his cockroach population is 0.7.
Explain the differences in population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources.
A previous study has shown that freckles gene is located at the locus marked F, and hair color gene is located at the locus marked H, both on the long chromosome.
Assume you are studying fruit fly wing development. The wingless gene determines shape of wings. The phenotype associated with dominant allele, W, is normal wing development.
You started with a stock solution and created a series of 4 solutions. Say the concentration of your stock solution is 350 g/L. What is the concentration of each of the solutions you created ?
The PSA test is the most widely used test to detect prostate cancer. The PSA marker is a protease that is manufactured specifically in the prostate gland.
Plants often produce waxes on the surface of their leaves to prevent dehydration and protect against insects. What structural feature of waxes makes them more suitable for this task than carbohydrates or proteins.
A snapdragon with pink petals, black anthers and long stems was allowed to self-fertilize. From the resulting seeds, 650 adult plants were obtained.
If an asexual spore from an Ascomycota fungus, such as lilac powdery mildew has 21 chromosomes, how many would you expect to find in a sexual spore?
In snapdragons, the the genes A, B, C, and D assort independently of one another. If an Aa Ba Cc Dd plant is crossed with an Aa bb cc Dd plant, what is the probability of obtaining a snapdragon plant that is phenotypically dominant for all four tr..
What are some foods that are products of microbial fermentations? Provide three examples involving three different starting materials and microorganisms.
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