Suppose that global warming causes ocean rise that obliterates most of the Gulf Coast of Florida and much of its human population, and that radiation leaking from the destroyed Big Bend Nuclear Power Station causes a mutation that yields green hair in humans with the homozygous recessive mutant allele. Many years pass and a new island appears in the Gulf. This island is then colonized by an intrepid human population that is fixed for the recessive green hair allele. If the island population grows to 10,000 individuals and then an individual who is heterozygous for the green hair locus arrives on the island and mates with one of the residents, how many generations will it take for the dominant, non-green hair allele to reach a frequency of 99%? (Assume viability selection 20% in favour of the non-green allele and ignore the effects of genetic drift).

Q: Homologous genes that arise from speciation and gene divergence are called _____.

A: Homozygous is defined as a condition during which an individual inherits the same alleles or…

Q: The ancestor of cats was presumably homozygous for wild type at all of the described genes. What…

A: Gene mapping refers to the process of determining the location of genes on chromosomes. It involves…

Q: The variation in some traits is due only to variation in the environment (and not to variation in…

A: Hi dear, here's your answer.please give a like . Traits like these don't develop through normal…

Q: DNA sequences from randomly chosen individuals from the two populations are shown here – A1…

A: Genetic variation is how much the genotype of an organism differs from other organisms. The genotype…

Q: A population of chipmunks lives across the length of a valley in the mountains. One day a large…

A: The process of genetic divergence or gene pools of populations to form new species is called…

Q: A species of aphid normally breeds and lays its eggs on the new growth of a plant in the month of…

A: The evolutionary process that helps a new species come into being is called speciation. Speciation…

Q: If two groups of mice live on opposite sides of a river, they are two separate species. What two…

A: It is a group of living organisms consisting of similar individuals capable of exchanging genes or…

Q: Explain gene flow as a force of evolution (how does gene flow contribute to biological change?)

A: Gene flow is defined as vertical flow or exchange of genes in different populations of same species.

Q: How does the founder effect show that Africa is where our species originated? (Hint: Think about…

A: The objective of the question is to understand how the founder effect, a concept in evolutionary…

Q: Consider figure 22.5b. The following statements are true. Choose all applicable options.  a) Hair…

A: Humans and chimpanzees followed divergent evolutions in which both have a common ancestry but due…

Q: Ethion is an insecticide that kills leaf-eating insects such as mites. A species of mite develops a…

A: Microevolution refers to changes in the allele or gene Irequencies in a population over short time…

Q: Which of the following is a reasonable explanation for this pattern? Group of answer choices   A)…

A: Neoteny  The traits which is seen in the juvenile and remain unchanged as the organism grow. It is…

Q: Jean-Baptiste de Lamarck’s explanation for the evolution of long-necked giraffes from shorter-necked…

A: The objective of the question is to identify which of the given features would not be included in…

Q: Would each of the following examples of reproductive isolation be considered a prezygotic or…

A: Reproductive isolation is one of the mechanisms of speciation. Evolutionary mechanisms, behaviors,…

Q: Which of the following best describes Muller's ratchet?   a. Asexually reproducing lineages are…

A: Asexual reproduction is characterized by the absence of fusion of gametes, and by the absence of…

Q: The red wolf (Canis rufus) was once widespread in the southeastern United States but was declared to…

A: The endangered species is a species whose number has fallen to a critically low level and is likely…

Q: Some populations change noticeably in form within a hundred years. If only one gene in every 200,000…

A: Some of the population changes noticeably for hundred years. If one gene in every 200.000 mutates…

Q: Which of the following changes or mutations can be acted upon by natural selection? For each choice,…

A: Evolution is the gradual accumulation of changes in organisms over a period of time. The theory of…

Q: All of the following are examples of prezygotic isolation except? A.) Two closely related species…

A: The prezygotic and postzygotic isolation causes speciation of different species. This causes…

Q: If this model continues, with no major changes to the environment, what do you expect to happen? A)…

A: Natural selection can cause microevolution (change in allele frequencies), with fitness-increasing…

Q: You conduct an exercišé iñ the conditions under which survival of snails is selective-that is,…

A: The answer to the question is: Yes, because there was a change in the mean shell thickness.

Q: The raw material for evolution is random mutation. Discuss whether or not you view evolution as a…

A: The process of Biological evolution refers to the cumulative changes that occur in a population over…

Q: A population of interbreeding birds has been split by a geological event after which the isolated…

A: Species divergence is the process in which two species evolve from common ancestor due to…

Q: Some fish in a murky underground lake have lighter scales than the others. this makes it slightly…

A: Natural events can sometimes work in such a way that a particular morphotype of a species may find…

Q: Polar bears have "white" fur. Identify, with justification, what may have led to the evolution of…

A: Answer.) :- The evolution of polar bears' white fur is a result of a process called natural…

Q: In the absence of evolution, the only way of producing new variation of single genes is gene flow.…

A: Evolution is the cumulative change that has occurred over several generations by the accumulation of…

Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.