Conditional mutations are those where the trait is seen only under certain conditions. In permissive conditions the mutant allele has wild-type functions and under restrictive conditions the mutant allele has defective functions. True False
Sol.
Conditional mutation maybe defined as a mutation that has wild type phenotype under certain (permissive) environmental conditions and a mutant phenotype under other (restrictive) conditions.
So the statement given in the question is true i.e. "conditional mutations are those where the trait is seen only under certain conditions. In permissive conditions the mutant allele has wild-type functions and under restrictive conditions the mutant allele has defective functions" is a true statement.
Conditional mutations are those where the trait is seen only under certain conditions. In permissive conditions...
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Conditional alleles are mutant gene versions encoding proteins that can function normally at the permissive condition but are defective at the restrictive condition. One commonly used condition is temperature. Conditional alleles are especially useful to geneticists because they permit the study of essential genes. At the permissive temperature, the organism lives normally. When the organism is shifted to the non-permissive temperature, the effect of inactivating the gene can be studied. Which of the alleles shown below (mutations...
Which of the following statements regarding gene mutations is NOT true? Conditional mutations have different phenotypic effects under different conditions and can be used to study the function of essential genes. Silent mutations cannot have any phenotypic effect on an organism. Frameshift mutations often result in a truncated protein product, similar to a nonsense mutation. Dominant mutations have a phenotypic effect despite the presence of one functional wild type allele.
e) Can you identify any wildtype (nonmutant) colonies in the figures? Explain your answer. f) Can you identify any standard (non-conditional) mutants in the figures? Explain your answer. g) Can you identify any conditional mutants in the figures? Explain your answer. 23°C mutant colony in which cells proliferate at the cooler, permissive temperature but fail to proliferate at the warmer, nonpermissive temperature 23°C colonies replicated onto two identical plates and incubated at two different temperatures mutagenized cells plated out in...
Answer Choices:
A) Only one of the strains has a mutation in an eye color
gene.
b) Strains C and D have mutations in different genes.
C) Strains C and D have mutations in the same gene.
D) More information is needed to infer the location of
mutations.
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A–G). In each strain, the white eye trait is due to...
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Assume that during a quality assurance test under controlled conditions, readings on a certain type of thermometer are normally distributed with a mean of 0.00 °C and a standard deviation of 1.00 °C. Assume that as a result of the test, 3 percent of all thermometers produced will be rejected because they display temperature readings that are too high and a further 3 percent will be rejected because they display readings that are too low; the remaining 94 percent will...
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5. Quantitative trait loci(QTL) are: The loci that contribute all of the variation in a continuous trait The loci that contribute all of the genetic variation in a continuous trait The loci that contribute the broad-sense heritability in a continuous trait The loci that contribute the narrow-sense heritability in a continuous trait 6. We looked at a study where Drosophila flies were selected for phototaxis (either attracted to or repelled by light). This experiment measures how much genetic variation existed...
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