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A short-tailed mutant of mouse was discovered. Multiple crosses of this mouse to normal mice produced 27 normal, long-tailed mice and 25 short-tailed mice. A series of crosses among short tailed mice were made and 21 short-tailed mice and 11 long-tailed mice were produced. Determine which phenotype is dominant and explain the ratios observed with regards to the genotypes of the parents in each cross.
2-mutant, colorless strains of the (fictitious) haploid fungus Cyanomyces are crossed. The progeny consists of 50% wild-type and 50 percent mutant spores.
A set of monohybrid crosses is like those done by Mendel. Three-fourths of the F2 plants have purple-flowers and the rest have white-flowers. If a purple plant is picked at random and selfed, what is the probability that only purple-flowered plant..
What are the physical changes needed in the body that would require to happen in order for our bodies to live forever. Changes such as telomerase activity, collagen flexibility, environmental changes, role of the immune system, DNA repair enzymes:..
A breeder wishes to estimate narrow sense heritability for adult weight in a population of turkeys. The mean weight of the parental population was 18 pounds.
DNA is isolated from two different species. Both DNA samples are found to be exactly the same size. One of the DNA samples has a G+C/A+T ratio of 4.8 and the other 3.2.
what is the functional significance of the decreased amount of cartilage and the increased amount of smooth muscle in the lower respiratory passageway.(larynx)
Within the two groups define by the bone mass, smaller skeletons have bones with evidence of epiphyseal plates, but larger bones have only a thin line where the epiphyseal plates should be. Give the age group and gender of the individuals in this fin..
explain the advantage and disadvantage of random addition or deletion of nucleotides at VDJ junctions during re-arrangement of immunoglobulin gene segments.
Xavier smoked large amounts of marijuana, and benozopyrene in the smoke damaged the DNA in his lung cells, which could eventually become cancerous if other factors are present. How would you classify the benzopyrene?
Which plant would lose the most water by transpiration? A. Plant at standard room conditions, B. Plant being misted, C. Plant with wind blown from fan. Please explain why you chose the answer.
Design an experiment to detect the presence and number of Acetobacter in wine. Why would you want to perform such test?
In horse, black coat colour is influenced by the dominant allele (B) and chestnut coat colour by the recessive colour (b). Trotting gait is due to dominant gene (T), pacing gait to the recessive allele (t). What colour horse would you use to find out..
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