15) Both the founder event and genetic bottlenecking A. Increase the genetic variability of a new...

15) Both the founder event and genetic bottlenecking A. Increase the genetic variability of a new population after the event.

B. Always lead to extinctions.

C. Decrease the genetic variability of a new population after the event.

D. Are always caused by natural disasters.

Solutions

Expert Solution

Correct Answer is Option C.

Founder event is caused when a small population gets separate from the original population to form a new one. This causes reduction in genetic diversity.

Bottleneck effect refer to heavy decrease in the size of the population due to famine, earthquake, other natural calamities, disease or other human activities.

Thus the resultant effect of both these phenomenon will only lead to decrease in the genetic diversity nad variability of new population after the event.

1. Option A is wrong because in neither case genetic variability has any chance of increase.

2. Option B is wrong because bottle neck effect cause reduction in population size. Thus the only naturally fit individuals are selected to survive. Thus they provide a healthy start to new generation hence chance of extinction is less.

3. Option D is wrong because only bottle neck effect is caused by natural disaster. But founder events are caused only due to population division which is not due to natural disaster.

gladiator answered 1 year ago

Next > < Previous

Related Solutions

New combinations of genetic material give rise to genetic variability in sexually reproducing organisms through crossover...

New combinations of genetic material give rise to genetic variability in sexually reproducing organisms through crossover events between nonsister homologous chromatids. crossover events between sister chromatids. egg and sperm genetic recombination from distinct individuals. egg and sperm genetic recombination from one individual in which crossing over and independent assortment of homologues has occurred. A, C, and D all contribute to genetic variability.

What is the difference between genetic drift and founder effect?

Briefly explain the three factors that contribute to genetic variability.

Briefly explain the three factors that contribute to genetic variability. Independent assortment Crossover of homologues Random fertilization Briefly describe the following. Provide an example for each. Dominant-recessive inheritance Incomplete dominance inheritance Multiple-allele inheritance Sex-linked inheritance Polygene inheritance Extranuclear (mitochondrial) inheritance (not really a pattern What role, if any, do environmental factors play in gene expression? What is genetic screening? Why do they determine pedigrees? What do we mean by the following terms: Homozygous trait Heterozygous trait Dominant gene Recessive...

1. Evolutionary process and genetic variation: a) Explain to the general public how genetic variability occurs...

1. Evolutionary process and genetic variation: a) Explain to the general public how genetic variability occurs in domesticated organisms, and why mutation is an essential component that allows for production of new agricultural varieties. b) Explain the following statement to a college science freshman: “The genetic variation on which natural selection acts may occur randomly, but natural selection is not random at all.” c) Describe two situations where mutations are random, and two situations where the mutations are not random. ...

Identify THREE ways that sexual reproduction increases genetic variability. For each, explain how it increases genetic...

Identify THREE ways that sexual reproduction increases genetic variability. For each, explain how it increases genetic diversity among the offspring.

Briefly describe three main mechanisms that produces genetic variability in the F1

Question 6 Part a: Which of the following are examples of genetic drift? A) founder effect...

Question 6 Part a: Which of the following are examples of genetic drift? A) founder effect B) natural selection C) bottleneck effect D) migration Group of answer choices A. Both A) and B) are examples of genetic drift B. both B) and D) are examples of genetic drift C. Both A) and C) are examples of genetic drift D. all of these are examples of genetic drift ________________________________________________________________________________ Question 6 Part b: Which of the following causes changes to populations...

1. Describe the differences between bottleneck effect and founder effect. What are their impacts on genetic...

1. Describe the differences between bottleneck effect and founder effect. What are their impacts on genetic diversity in a population? How is their impact on a population reversed over time? 2. Define sympatric and allopatric speciation and give an example of each type 3. Describe three key differences between phyletic gradualism and punctuated equilibrium.

Bottlenecks and the founder effect are two different types of genetic drift. How do they differ?...

Bottlenecks and the founder effect are two different types of genetic drift. How do they differ? Provide an example of each

Describe the mechanisms by which meiosis would introduce genetic variability in a population. If one diploid...

Describe the mechanisms by which meiosis would introduce genetic variability in a population. If one diploid yeast cell was heterozygous for an allele with a Dominant mutation on it, what proportion of its offspring could be expected to carry that dominant mutation after mating? (Assume it mates with a cell that is homozygous for the normal, recessive allele.) Interestingly, yeast switch to sexual reproduction when they are under conditions of stress. For the purposes of this task, assume yeast populations...

Subjects