Chemicals that insert themselves in DNA cause frameshift mutations.
Indicate whether the statement is true or false.
Answer: True.
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Sulfide oxidizers are among the most ecologically diverse trophic groups because of the different strategies they employ to access sufficient amounts of sulfide and oxygen simultaneously
Indicate whether the statement is true or false.
A farmer performs truncation selection to try to increase the weight of peaches in his orchard. Which statement correctly describes a possible outcome of this selection?
A) If peach weight is not heritable, the average weight in the next generation will increase. B) If peach weight is heritable, the average weight in the next generation will increase. C) The average peach weight will decrease due to this inbreeding. D) If peach weight is heritable, the average weight in the next generation will decrease.
In flowering plants, one sperm nucleus fuses with an
egg nucleus, and a zygote forms that develops into an embryo. Another sperm nucleus a. fuses with a primary endosperm cell to produce three cells, each with one nucleus. b. fuses with a primary endosperm cell to produce one cell with one diploid nucleus. c. fuses with the endosperm mother cell, forming a primary endosperm cell with a single triploid nucleus. d. fuses with one of the endosperm mother cell nuclei to produce a diploid tissue that serves as the food supply for the embryo. e. degenerates.
A cross was made between homozygous wild-type female Drosophila and yellow-bodied male Drosophila. All of the resulting offspring were phenotypically wild type. Offspring of the F2 generation had the following phenotypes:
Sex Phenotype Number male wild 96 male yellow 99 female wild 197 Based on this information, how is the yellow allele inherited? A) dominant, autosomal B) sex-influenced inheritance C) recessive, autosomal D) recessive, X linked E) dominant, X linked