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Wild type Arabidopsis is a selfing diploid plant with 2n=10. You notice five different varieties with distinct phenotypes that involve leaves and fruit of abnormal size, shape and color. These mutations do not breed true and have odd segregation patterns.
A) Suggest a chromosomal basis for these mutations and explain why the segregation patterns are strange.
B) When Arabidopsis is crossed to a close relative Capsella(2n=10) a hybrid is created between them. How many chromosomes would the hybrid have? Explain your reasoning
C) Would the hybrid be sterile or fertile? Explain your reasoning.
Noda and Numa in 1984 isolated the first voltage-gated sodium channel gene from the electric organ of the electric eel. Electric organs contain a high density of sodium channels. Tetrodotoxin (TTX) is a potent neurotoxin that blocks sodium channels. ..
Why is co-transfection of two promoter-reporter plasmids always required when conducting these kinds of experiments? Briefly, describe how this is done.
Diversity in tropical regions is generally greater than at high latitudes. Explain two different hypotheses that propose the mechanism for this pattern that remains a biological mystery
Draw three asexually reproducing conidiopheres and label conidia and Explain the shape and general appearance of the sexually budding cell.
Based on what we have learned this term about cell function and homeostasis, explain why acid rain is so damaging to plants, such as the radish. How is it that some plants have developed a tolerance to low pH conditions? Be sure to cite source(s) ..
Given that the genomes of all organisms are made up of As, Ts, Cs, and Gs, how does one account for diversity in organisms? What are some factors that could adversely affect diversity in nature?
A very short physiology student is asked to analyze the blood pressure of a very tall student. She decides to measure the blood pressure at the level of the tall student's foot while he is standing
If the sheep population in Tasmaania went from 30,000 in 1820 to 1,900,000 in 1850, what was this population's annual r value during this period?
Diatoms are mostly asexual members of the phytoplankton. Diatoms lack any organelles that might have the 9+2 pattern. They obtain their nutrition from functional chloroplasts, and each diatom is encased within two porous, glasslike valves.
The Neurospora cross was made between a strains that carried mating type A and mutant allele arg-1(arg) and another strain the carried mating-type a and the wild type arg-1 (+) gene. Four hundred linear octads were isolated and they fell into the 7 c..
How various kilograms of diatoms are needed to build 1 metric ton (1000kg) of blue whale. Give details how filter feeding by blue whales enables them to grow so large.
What are the primary differences between animal cells, plant cells, and bacteria cells? What chacteristics do they share.
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