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- In response to the following question, write a sentence outline and one bodyparagraph. using cause and effect writing methodDiscuss the steps involved in controlling the spread of Covid-19 in Trinidad.Only additive genetic effects are transmitted to the progenies. Dominance and epistasiscould not be transmitted.In considering the formation of the A–P and D–V axes inDrosophila, we noted that, for mutations such as bcd,homozygous mutant mothers uniformly produce mutant offspring with segmentation defects. This outcomeis always true regardless of whether the offspring themselves are bcd+/bcd or bcd/bcd. Some other maternaleffect lethal mutations are different, in that the mutantphenotype can be “rescued” by introducing a wild-typeallele of the gene from the father. In other words, forsuch rescuable maternal-effect lethals, mut+/mut animals are normal, whereas mut/mut animals have the mutant defect. Explain the difference between rescuableand nonrescuable maternal-effect lethal mutations.
- Disease Process of Covid-19(Diagram)Is it more indicated for ageneticist desiring to map theX chromosome of the motherof a given family (theresearcher does not haveaccess to her DNA, only accessto the genetic material of theoffspring) to analyze thechromosomes of herdaughters or of her sons?Two adjacent cells in the nematode worm nor-mally differentiate into an anchor cell (AC) and a ventraluterine precursor (VU) cell, but which of the two becomesthe AC and which becomes the VU cell is completely ran-dom: the cells have an equal chance of adopting eitherfate, but they always adopt different fates. Mutations ofLin12 alter these fates. In hyperactive Lin12 mutants, bothcells become VU cells, while in inactive Lin12 mutants,both cells become ACs. Thus, Lin12 is central to the deci-sion-making process. In genetic mosaics in which oneprecursor cell has the hyperactive Lin12 and the other pre-cursor has the inactive Lin12, the cell with the hyperactiveLin12 always becomes the VU cell and the cell with inac-tive Lin12 always becomes the AC. Assuming that one cellsends a signal and the other cell receives it, explain howthese results suggest that Lin12 encodes a protein requiredto receive the signal. Offer a suggestion for how the fatesof these two precursor cells are normally…
- An individual is found to have some tetraploid liver cellsbut diploid kidney cells. Be specific in explaining how thiscondition might arise.An individual is found to have some tetraploid liver cells but diploid kidney cells. Be specific in explaining how this condition might arise.In a cross of Lymnaea, the snail contributing the eggs was dextralbut of unknown genotype. Both the genotype and the phenotypeof the other snail are unknown. All F1 offspring exhibited dextralcoiling. Ten of the F1 snails were allowed to undergo self-fertilization.One-half produced only dextrally coiled offspring, whereasthe other half produced only sinistrally coiled offspring. Whatwere the genotypes of the original parents?
- On rare occasions, a chromosome can suffer a small deletionthat removes the centromere. When this occurs, the chromosome usually is not found within subsequent daughter cells.Explain why a chromosome without a centromere is not transmitted very efficiently from mother to daughter cells. (Note: Ifa chromosome is located outside the nucleus after telophase, itis degraded.)What are the molecular switches involve in sporulation? explain the switches involved not the stages. molecular switches are different from sporulation stages.A zookeeper has collected a male and a female lizard that look likethey belong to the same species. They mate with each other andproduce phenotypically normal offspring. However, the offspringare sterile. Suggest one or more explanations for their sterility.