GENETIC Screening

In the United States, most state health departments require screening for genetic disorders in newborns. Some states go so far as to require pre-marriage genetic testing, where they examine the potential parents for risk of genetic disorders in their offspring. It’s worth noting, however, that some states allow for exemptions from testing based on religious convictions or other established reasons.

In your initial post, state whether or not you believe it’s appropriate for states to require pre-marriage genetic testing. Explain your reasoning and support your position with credible resources.

Sample Solution

Fruit Flies and Genetics Research

  1. Fruit Flies and Genetics Research: Imagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.
    • Explain how you would design an experiment to answer this question.
    • Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive?
  2. Model Genetic Organisms: Why are fruit flies considered a model genetic organism? Would humans fit this description?
  3. Adaptations to a Changing Environment
    • Explain why it is necessary for organisms to have the ability to adapt.
    • Why is the current environment making it difficult for organisms to adapt?
    • Explain how organisms develop adaptations.
  4. Artificial Selection
    • Explain how artificial selection is like natural selection.
    • Why are quail useful subjects for an experiment on selection? What other organisms share similar characteristics?
  5. Species Interactions
    • Describe the form of species interaction that was observed between members of lion pride and between lions and hyenas.
    • Explain how this type of interaction may affect the population densities of the two species.
  6. Competition Between Species
    • Competition occurs when organisms compete for access to limiting resources. Can you think of resources that are not limiting?
  7. Selection of Traits
    • Do you think natural selection has shaped traits in these species that makes them better competitors?
    • If so, what types of traits might be involved? Explain your reasoning.

Sample Solution

Characteristics of a progressive?

Review the following site:

Link (website): Presidential Election of 1912: A Resource Guide (Links to an external site.)
Here is the link: https://www.loc.gov/rr/program/bib/elections/election1912.html

Then, address the following:

According to Roosevelt, what are the characteristics of a progressive?
Explain and give examples of the characteristics of “anti-progressives.”
Trace what types of activities “anti-progressives” engaged in?
Analyze the goals of progressivism.
Explain what areas of society progressives addressed?
Analyze the progressive achievements Roosevelt highlights in his speech?

Sample Solution

PRINCIPLES OF GENETICS

Vaccines are inactive or partially active forms of a pathogen that trick the immune system into acting early by producing antibodies. This allows a person’s immune response to prepare itself in case it encounters the natural pathogen.
Describe the differences between a live and dead vaccine. What are the risks associated with both vaccines?
What does herd immunity mean? Research the Centers for Diseases Control and Prevention (CDC) website for vaccine-preventable diseases and identify the diseases that are on the rise.
Autoimmune diseases occur when the immune system produces antibodies that attack the body’s own tissues. The signs and symptoms of autoimmune disorders depend on the type of cell that is affected.
Describe an autoimmune disorder, other than multiple sclerosis, colorectal cancer, psoriasis, asthma, respiratory syncytial virus infections, Crohn’s disease, and rheumatoid arthritis.
Describe a few symptoms of the disease.

Sample Solution

Genetics and eugenics

Issues surrounding human genetics and eugenics, including stem cell research, cloning, and genetic testing and treatment.

Choose and describe a scientific technique or practice related to genetics and eugenics. Provide the rationale behind the use of this technique or practice.
Discuss your thoughts and ideas regarding the technique or practice. Is it ever justifiable? Why or why not?

Sample Solution

Human genetic

This week, we are learning about issues surrounding human genetics and eugenics, including stem cell research, cloning, and genetic testing and treatment.
Choose and describe a scientific technique or practice related to genetics and eugenics. Provide the rationale behind the use of this technique or practice.
Discuss your thoughts and ideas regarding the technique or practice. Is it ever justifiable? Why or why not?

Genetics Problems

1)In guinea pigs, black fur is dominant over white fur. How could an animal breeder test whether a black guinea pig is homozygous or heterozygous?
2)A short stem, yellow pod pea plant is crossed with a true breeding long stem, green pod pea plant. Assuming that long stems are dominant to short stems, and green pods are dominant to yellow pods 1) what are the genotypes and phenotypes of the F1 generation? and 2) the genotypes and phenotypes from a F1 x F1 cross?
3)In humans, hemophilia (bleeder’s disease) is a recessive, X-linked trait. Use a Punnett square to show the possible genotypes of offspring of a man who is a hemophiliac, and a normal, but heterozygous woman, where XH contains the normal clotting gene and Xh contains the gene for hemophilia.
4)Lesch-Nyhan syndrome is a metabolic defect caused by the lack of the enzyme hypoxanthine-guanine phosphoribosyl transferase (HGPRT). This disease is the result of an X-linked, recessive mutation and results in mental retardation, selfmutilation and early death. A normal man marries a woman who had a brother who died of LNS. Your are the genetic counselor who will advise them on the likelihood of their having a LNS baby.
a)What are the possible genotypes for the woman? What is the man’s genotype?
b)For each of the woman’s possible genotypes, what are the possible genotypes of her offspring and the implications for survival for each of them?

Sample Solution

Human genetics and eugenics

This week, we are learning about issues surrounding human genetics and eugenics, including stem cell research, cloning, and genetic testing and treatment.

Choose and describe a scientific technique or practice related to genetics and eugenics. Provide the rationale behind the use of this technique or practice.
Discuss your thoughts and ideas regarding the technique or practice. Is it ever justifiable? Why or why not?

Sample Solution