Beetles on a diet
Imagine a year or two of drought in which there are few plants a beetle can eat.
First generation of starving beetles
All the beetles have the same chances of survival and reproduction, but because of food restrictions, the beetles in the population are a little smaller than the preceding generation of beetles.
Second generation of starving beetles
Beetles of a different color
Most of the beetles in the population (say 90%) have the genes for bright green coloration and a few of them (10%) have a gene that makes them more brown.
Second generation of starving beetles
Some number of generations later, things have changed: brown beetles are more common than they used to be and make up 70% of the population.
Second Generation
Image credits: University of California Museum of Paleontology's Understanding Evolution (http://evolution. berkeley. edu).
Question: Which example illustrates descent with modification β a change in gene frequency over time, "Beetles on a diet" or "Beetles of a different color"? Why did you choose this example?
Answers: 2
Biology, 21.06.2019 20:50, witchhunt666
Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?
Answers: 1
Biology, 22.06.2019 03:30, krisgrace1485
Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis
Answers: 1
Beetles on a diet
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