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Two extensively inbred strains of summer squash - designated "crookneck" and "scallop" - are crossed. The length of fruit in the crookneck averages 40 cm and that in the scallop averages 7 cm. In the F1 generation of the cross crookneck X scallop, the average fruit length was 18 cm and the variance in fruit length was 11 cm2. In the F2 generation obtained from the crossF1 X F1 and grown under the same conditions, the variance in fruit length was 70 cm2. a. What is the standard deviation of the fruit length in the F2 generation?b. What is the magnitude of the environmental variance in the F2 generation?c. What is the magnitude of the genotypic variance in the F2 population?d. What is the broad-sense heritability of fruit length in the F2 population?e. Are most differences in fruit length in the F2 generation due to differences in genotype among the plants or to differences in environment?
Comare the structure and function of chloroplasts and mitochondria and discuss how do post-transcriptional and post-translational mutations affect the final products?
A forty-two year old woman decides to lose weight on a diet prescribed by an anorexic friend. She loses about thirty pounds in 45 days, but her serum potassium level falls to 2.1 mmol/L.
During sleep, relay neurons in the thalamus reduce information reaching the cerebrum by altering their membrane potential. In diagnosing bacterial and viral infections of the nervous system, samples of CSF are extracted from the spinal cord.
In the F2 generation, how many genotypic classes are possible from a trihybrid cross of heterozygotes in Determine which the genes involved show complete dominance?
The new form of life is discovered. It has a genetic code much like that of organisms on Earth except that there are five different DNA bases instead of four and the base sequences is translated as doublets instead of triplets. How various different ..
Integrative medicine is a way of thinking that applies systems concepts to understand acute and chronic complex disorders. Select a chronic disease such as Diabetes, CVD, obesity or cancer and describe the characteristics of homeostatic system in ..
What is the portal for selective export of mRNA out of the nucleus? When microtubules grow out of a centrosome, which end is oriented away from the centrosome?
Cephalochordates and placental mammals both have microlecithal eggs, yet mammalian early development resembles that of birds more than that of amphioxus.
A black A/A B? B C? C is crossed with a colourless a/a b/b c/c to give a black F1. The F1 is selfed. What proportion of the F2 individuals is colourless.
In bacterium that possesses antibiotic resistance and potential to persist through very adverse conditions, such as freezing, drying, or high temperatures, DNA have to be located within, or be part of, which structures.
There is evidence that many of differences in DNA sequence among species are not adaptive. Other differences among species, both in DNA and in morphology
Smilin is a protein that causes people to be happy. It is inactive in many chronically unhappy people. The mRNA isolated from a number of different unhappy persons in the same family was found to lack an internal stretch.
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