Orangutans are an endangered species in their natural environment (the islands of Borneo and Sumatra), so...

Orangutans are an endangered species in their natural environment (the islands of Borneo and Sumatra), so a captive-breeding program has been established by using orangutans currently held in zoos around the world. One component of this program is cytogenetic research. This research has shown that orangutans from the two islands have different forms of chromosome 2. Before this cytogenetic difference became known, some matings were carried out between animals from different islands, and 14 hybrid progeny are now being raised in the breeding program.

What term/s describe the difference/s between these chromosomes?
Draw the chromosomes 2 pairing of such a hybrid individual, during the first meiotic prophase.
In 40% of meioses, there will be a crossover somewhere in the region between bands p1.1 and q1.2. Draw the chromosomes 2 gametes that would result from a meiosis in which a single crossover occurred within band q1.1.
What fraction of the gametes produced by a hybrid orangutan will give rise to viable progeny, if only these chromosomes differ between the parents?

Solutions

Expert Solution

Answer:

Two primate subspecies of orangutans, namely Borneo and Sumatra are distributed in two different islands. The chromosome rearrangement between the two shows that Borneo species chromosome for is homozygous for one type of chromosome number 2 whereas the Sumatra is homozygous for different type of chromosome number 2. Both show same type of karyotyping except for a single chromosome pair which is due to by pericentric inversion. Pericentric inversion occurs when there is a break in the centromere and also each arm of the chromosome.Therefore, the term used for describing the difference between chromosomes of Borneo and Sumatra species is pericentric inversion.
The diagram for the first meiotic prophase of chromosomes 2 pairing of Borneo and Sumatra species.
The diagram for gametes of chromosomes 2 from meiotic process due to a single crossover within band q1.1.
The fraction of gametes formed by a hybrid orangutan that shows difference between chromosomes of parents is 85%. When a cross over occurs in the inverted region between 50% viable parents and 50% unstable gametes; the offspring would be non-viable. If there is chance of 30% meiosis in the cross over region, approximately 15% of gametes produced by offspring is viable. Thus there is an 85% chance of production of viable gametes in the offspring.

gladiator answered 1 year ago

Next > < Previous

Related Solutions

What effect does the Endangered Species Act 1973 has on the environment and people?

Why should humans care about protecting the environment, including endangered and threatened species? Explain at least...

Why should humans care about protecting the environment, including endangered and threatened species? Explain at least two reasons that are biologically based.

Name three endangered animal species in Florida.

research conservation efforts “Endangered species in Canda,” Are any species likely to be extinct within the...

research conservation efforts “Endangered species in Canda,” Are any species likely to be extinct within the next 50 years? Pick one conservation effort and evaluate published reports. Is it likely that the species will recover and what are the major obstacles to overcome in order to achieve species preservation? Provide suggestions for research to be conducted for better management, as well as changes to management to improve odds of recovery for the species.

What role does knowing an endangered species genome play?

Species-area relationships were assessed for reptile species on two sets of islands in different regions of...

Species-area relationships were assessed for reptile species on two sets of islands in different regions of the Indian Ocean. The estimated parameters were as follows: Region 1: c=1.6, z=0.25; Region 2: c=1.8, z=0.35. It is expected that 40% of the reptile habitat will be lost to development pressure over the next decade. In which region do you expect the loss of reptile species to be greatest, and by how much? Show your work and explain your answer. (3 pts) b)...

Small areas that have a large number of endangered and threatened species are referred to as...

Small areas that have a large number of endangered and threatened species are referred to as ______. Select one: a. biodiverse environments b. biologically magnified c. endemic environments d. biodiversity hot spots 2. The primary goal of conservation biology is to ______. Select one: a. integrate human culture back into nature b. maximize the land set aside for wildlife c. counter the loss of biodiversity d. catalog species 3. Organisms that consume producers are ______. Select one: a. detritivores b....

You are working on a conservation farm with an endangered species of antelope in central Colorado....

You are working on a conservation farm with an endangered species of antelope in central Colorado. You notice that birth weight of offspring seems to correlate with air temperature, but that the relationship is not as strong in females as in males. You wonder why that could be. a) What is your testable hypothesis? b) Design an experiment to test that hypothesis. c) What is your null hypothesis? d) Describe the type of data you will get from the experiment....

Background: You are studying three populations of an endangered species of toad that used to be...

Background: You are studying three populations of an endangered species of toad that used to be common in the California central valley. Global warming has caused this species to retreat to higher elevations in recent decades where it stays cooler; the toad used to be found throughout the valley, but is now restricted to the tops of three mountains. Sampling each population reveals that the toad population on each mountaintop is limited to a few hundred individuals, whereas historical records...

Discuss the Natural Environment as a Stakeholder.

Subjects