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Scientific method for genetic studies

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I have attached the full question, but in summary, it asks that I use scientific method to explain which genes are recessive and which are dominant.

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Title: Heredity Lab
Instructions: Write a 1- page lab report using the scientific method to answer the following questions:
• State which genes are dominant (the genes that get expressed over the other genes) and which genes are recessive (the genes that will not be expressed when the dominant gene is present).
P = gene for purple flower
p= gene for white flower
P = trait for purple flower. It is the dominant gene.

p = trait for white flower. It is the recessive gene.

Pp - heterozygous for purple flower

pp - white flower

Gregor Mendel's studies laid the foundation for modern genetics. In a series of elegant experiments, Mendel was able to deduce the most fundamental laws of single-gene and multiple-gene inheritance without having the scientific data on chromosomes, their structure, or meiotic segregation. In this lab, you will incorporate these 2 pieces of the puzzle to interpret the experimental results that were obtained by Gregor Mendel in 1865.

Part 1: Using the lab animation, fill in the following data table to help you generate your hypothesis, outcomes, and analysis: https://class.aiuniv.edu/_layouts/MUSEViewer/Asset.aspx?MID=MU18806&aid=AT99992

How do you know which genes are which?

P = trait for purple flower. It is the dominant gene.

p = trait for white flower. It is the recessive gene.

Pp - heterozygous for purple flower

pp - white flower

Pp= purple flower self-pollinate itself
Pp X Pp

Punnett Square
½ P ½ p
P p
½ P ¼ PP ½ Pp
½ p ½ Pp ¼ pp

What is the ratio that is most likely to be observed across all traits?

Genotypic ratio:

¼ PP
¼ pp
ratio: 1: 2: 1
Phenotypic ratio: 3 purple: 1 white

Complete the following ...

Solution Summary

Mendel's pea plant experiment laid the foundation for genetic inheritance. By crossing pure breed pea plants, he had uncovered that the unit of inheritance is passed on to the next generation from each parents. The pair of alleles from each parents is passed on equally to the offsprings. He had formed the law of segregation. He had also stated that dominant alleles can be expressed with the exclusion of the other recessive alleles. The notion dominant over recessive comes into existing with Mendel's pea plant experiment. He had also uncovered the law of independent assortment when two genes can assort independently to the offsprings.

See Also This Related BrainMass Solution

PTSD and the scientific method

In this module's SLP assignment, you will take a break from the anatomy and physiology of stress to analyze the work you have done so far, specifically in your Module 3 Case Assignment.

The readings you accomplished for Module 3's Case Assignment are quite new scientific theories that are currently being tested by scientists who are trying to figure out why individuals suffer from behavioral issues such as depression and PTSD. The scientific and medical communities have collected a lot of evidence that stress plays a very big role in not only creating these behaviors, but also perpetuating them. We still have a long way to go and many unanswered questions!

By completing *Case 3, you have participated in the **scientific method. After you view this linked animation, use this ***diagram as your reference point to complete the following components of this assignment:
- In which part of the Case Assignment did you address Step 1, "observe and generalize"?
- Which part of the Case Assignment required you to accomplish Step 2, "formulate a hypothesis"?
- Did your hypothesis contain information that can be accepted as the absolute truth? If not, what information was missing? (HINT: Think back to the studies about cortisol and PTSD.) Based on the information that was missing from your hypothesis, what could you test in order to obtain more information on the unknown piece?
- Do a bit of research on the technology available today that could facilitate this test. Examples of new technology include brain imaging, blood chemistry and hormone level tests, CAT scans, MRIs, and DNA mapping. What step of the scientific method does this require?
- Now that you have some additional information, briefly and in simple terms, describe how you would test the missing information and which step of the scientific method this accomplishes.

* Case 3 (Attached)
**Scientific method linked animation (http://www.pearsoncustom.com/mct-comprehensive/asset.php?isbn=1269879944&id=10647)
***Diagram (attached)

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