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Human Pedigrees Biology Lab

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Introduction

Title: Human Pedigrees PLANNING A Purpose: Problem: Can human pedigrees be used to determine the probability of a trait appearing in an individual? Prediction: Experimental Design: Variables: a) Manipulated Variable: b) Responding Variable: c) Controlled Variables: PLANNING B Materials: Refer to Handout Procedures: Refer to Handout DATA COLLECTION Evidence: Refer to Handout DATA PROCESSING AND PRESENTATION Analysis: Part 1 Tay-Sachs Disease 1. Draw the pedigree in you notebook, and write the genotype for each individual below the circle or square. Part II Sickle Cell Anemia 1. How is this trait inherited? This trait is inherited by an autosomal recessive allele. 2. Draw the pedigree into your notebook, and write the genotype for each individual below the circle or square. 3. About 1 to 10 North American blacks are heterozygous for sickle-cell anemia. This number is very high for a trait that can be so detrimental for homozygous individuals. However, research has shown that heterozygous individuals. However, research has shown that heterozygous individuals have enhanced resistance to malaria. ...read more.

Middle

However, if females inherit the hemophilia gene, they will only have a 50% chance of showing the disorder. 3. Explain how the female (III-3) can have hemophilia. Since a female has two X chromosomes and has to get one from each parent, then the father can only give his hemophilic X chromosome and the mother can either give her hemophilic X chromosome or her normal blood X chromosome. In this case, the mother gave the daughter a hemophilic X chromosome. Part IVa Problems 1. How is this trait inherited? This trait is inherited by an autosomal dominant allele 2. Draw the pedigree in your notebook and write in the genotype for each individual. Part IVb Problems 1. How is this trait inherited? This trait is inherited by a sex-linked recessive allele 2. Draw the pedigree in your notebook and write in the genotype for each individual. Analysis and Interpretation 1. Could you determine the genotype of each individual in this Activity? I could not determine the genotype of each individual in this activity because some of the pedigrees did not indicate which individuals were carriers (heterozygous) ...read more.

Conclusion

Thus its most probable that my child would come out healthy, and even if it doesn't, the love that my wife and I provide should be able to overcome the disability 4. Many genetic diseases extract a high cost in terms of health care dollars. Since medicare is funded by government funds, should the government be allowed to legislate who may and who may not have children? Defend your position. No, they shouldn't have the power to decide because if the government did, the people carrying a disease or showing a disease would not be allowed to pass on their genes, thus the gene pool of the human race would be reduced, thus there is less variation, and a higher chance of more diseases developing. Eventually, everyone would be infected and the human race would be wiped out. CONCLUSION AND EVALUATION Conclusion: Through the findings of this lab, I discovered that pedigrees can be used to determine the probability of a trait appearing in the next generation and can be used help dictate whether a couple would want to have children or not. Evaluation: ?? ?? ?? ?? KevinTse February 16, 2006 ...read more.

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