Natural selection changes allele frequencies because some ______ survive and rep

Question

Natural selection changes allele frequencies because some ______ survive and reproduce more successfully than others. alleles loci species individuals In the formula for determining a population's genotype frequencies, the pq in the term 2pq is necessary because the population is diploid. heterozygotes can come about in two ways. the population is doubling in number. heterozygotes have two alleles. Considering the overall human population of the U.S. mainland at the time when the slave trade brought large numbers of people from equatorial Africa, what was primarily acting to change the frequency of the sickle-cell allele in the overall U.S. population? natural selection gene flow genetic drift founder effect Two of these responses are correct. You are maintaining a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, you notice that the viability of the flies has decreased greatly. Recognizing that small population size is likely to be linked to decreased viability, the best way to reverse this trend is to cross your flies with flies from another lab. reduce the number of flies that you transfer at each generation. transfer only the largest flies. change the temperature at which you rear the flies. shock the flies with a brief treatment of heat or cold to make them more hardy. What is true of natural selection? Natural selection is a random process. Natural selection creates beneficial mutations. The only way to eliminate harmful mutations is through natural selection. Mutations occur at random; natural selection can preserve and distribute beneficial mutations.

Explanation / Answer

2)D)indivisuals as indivisuals reproduce not others.

3)B) heterozygotes can come about in two ways

4)e)geneflow and genetic drift both affect it

5)C)transfer only the largest flies.

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