Which must be true for natural selection to occur?  Pick all that apply. 1. there must be an advantage to having one version of the trait over others 2. there must be variation in the trait 3. no other agent of microevolution can be occurring 4. it must happen randomly 5. there must be a small population 6. the trait must be heritable

Please answer 3

In a population of plants, individuals with medium-sized leaves have the highest survival and reproductive success because they can efficiently capture sunlight without losing too much water. Which type of selection is occurring in this scenario? Stabilizing selection Disruptive selection Frequency-dependent selection Directional selection

Assume that a population starts with the frequency of R of 0.3.  It then undergoes 3 generations of complete selection against the homozygous recessives. 1. What would you expect the frequency of the recessive allele to be after this period of selection? 2. How many white flowers would you expect?

Which of the following is Not required for Natural Selection to occur with a biological population? A. Not all offspring survive to reproduce B.Individuals is the population with some phenotypic variants must have higher fitness on average C. Individuals with one phenotype must always have more offspring than individuals with other phenotypes D. The phenotypical variation within a population of organisms must be heritable E. Variation in the phenotypes of organisms within a population

Artificial selection is when people selectively choose individuals with a certain desired trait to use as parents of the next generation. It is done to domesticated (or semi-domesticated) organisms. It has produced such monstrosities as bubble-eyed goldfish, revealing the potential for selection acting on heritable variation to produce varieties appearing very different than their ancestors. How is that different from natural selection? (Select all that apply) A- In artificial selection, humans directly cause new mutations to occur, whereas natural selection relies on mutations that occur randomly over time. B- Artificial selection can lead to organisms that would be unfit to survive in the wild, whereas natural selection usually makes the population better adapted. C- Artificial selection is directed ahead of time towards an intentional goal; not so with natural selection. D- Really, they are exactly the same process. Both cause what seems to be design without a designer. E-…

How does the founder effect impact human diversity according to the article of Race is real, But it’s not genetic ?

Natural selection can act on both ________, which is the probability of survival, and ________, which is the number of offspring produced. a: epistasis; epigenetics b: directional selection, frequency dependent selection c: livelihood; income d: viability; fecundity

Select all that are TRUE regarding the Hardy Weinberg Law. 1.It predicts the allele frequencies in the next generation 2.The dominant allele frequency is denoted as p 3.The genotype frequencies must add to 1 4.It assumes that natural selection is not influencing the population 5.The assumptions of the law are rarely met in natural populations

A hypothetical population has two alleles for a “B" gene: B1 and B2. In a random sample of 50 diploid zygotes (for a total of 100 alleles), the following genotypes were found: 20 B1B1, 20 B1B2, and 10 B2B2 The above values represent the initial genotype frequencies of zygotes in the population. Let's say that selection acts against the B2 allele, and all 10 individuals with B2B2 genotype die off before reaching maturity (leaving 0 B2B2 individuals). (The number of surviving adults in the population is 40, so the number of alleles is 80). What is the new observed frequency of the homozygous dominant genotype? O A. 0.10 О В. О.70 O C. 0.25 O D.0.50 O E. 0.75