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1. In the fruit fly Drosophila melanogaster, very dark (ebony) body color is determined by the e allele. The e allele produces the normal wild-type, honey-colored body. In heterozygotes for the two alleles (but not in e e homozygotes), a dark marking called the trident can be seen on the thorax, but otherwise the body is honey-colored. The e allele is thus considered to be incompletely dominant to the e allele. a) When female e e flies are crossed to male e e flies, what is the probability that progeny will have the dark trident marking? b) Animals with the trident marking mate among themselves. Of 300 progeny, how many would be expected to have a trident, how many ebony bodies, and how many honey-colored bodies?
Field observation suggests that populations of a particular species of herbivorous animals undergo cyclic fluctuations in density at 3 to 5 year intervals. Which represents a plausible explanation of these cycles?
Photosynthesis is the conversion of light energy to chemicalenergy by autotrophic organisms (primarily plants). In the process,oxygen is released. Photosynthesis requires light, so it would notoccur in the foil-wrapped bottles.
What do you think would happen to fungal hyphae that begin to grow into a substrate having a higher solute concentration? How might your answer be related to food preservation techniques such as drying or salting?
Ordinary table salt is sodium chloride. What is baking soda?
why Absorption of an inhaled gas is usually.
A DNA strand in a double helix contain 34 mol-% A , 22 mol-% T , 18 mol-% C , and 26 mol-%G , what is the composition of the complementary strand?
A woman is heterozygous. Which one could produce an egg in which two X chromosomes carry an allele for the recessive trait color blindness: nondisjunction during meiosis 1 or nondisjunction during meiosis 2? Then, Explain.
Differentiate among the three fungal phyla, Zygomycota, Ascomycota, and Basidiomycota on the basis of their reproduction methods, means of obtaining nutrients, and importance to humans.
Why did the successful cloning of Dolly the sheep support the idea that the differentiation of different cell types observed in development is orchestrated by gene regulation.
popularized in recent years by its use in high-profile criminalinvestigations and paternity cases, DNA, deoxyribonucleic acid, is most commonly used to prove a relationship to an individual
Which of the following hormones icreases the blood glucoselevel? The reabsorption of bones is mediated mainly by
Some of the abiotic factors that contribute to this islandchains tremendous diversity (your examples may include eitherterrestrial or marine organisms.
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