BIO FPX 1000 Assessment 5

Genetics Lab

The Genetics Laboratory provides thorough services covering every aspect of chromosome studies, from congenital disorders to prenatal diagnoses and hematologic or oncologic disorders. Technical support and consultative services are provided by the laboratory to assure quality patient care and promote interprofessional collaboration. This evaluation will cover the inheritance and genetic alterations, explain the genetic process that decides gender, describe the outcome of the karyotype, discuss how chromosomal defects influence body systems, and address the advantages and disadvantages of genetic testing and its effect on patients.

Chances of Individuals Inheriting the Autosomal Trait

When both parents are heterozygous or carriers, autosomal recessive conditions most often appear, with a 25% chance of inheriting the condition to their child. The allele for the disease has a 50% chance of inheritance from each parent, as indicated by the Punnett square model (Gulani & Weiler, 2020). The probability multiplication rule indicates a 50% possibility for both the mother and father to pass on their disease allele (Gulani & Weiler, 2020).

Inheriting two disease alleles of a recessive pattern leads to an autosomal recessive disease, as stipulated by Mendel’s Law of Segregation. Pedigree analysis enables the identification of the pattern of inheritance in families, with the autosomal recessive disorders most often affecting females and males with equal frequency. The pattern skips generations, while affected individuals usually are the product of unaffected carriers. Horizontal transmission can account for the occurrence of sick individuals at various locations (Gulani & Weiler, 2020).

The Gender of the Second Patient in a Lab Scenario

Sandra, a 28-year-old pregnant sickle cell anemic patient in her third trimester, requested a prenatal genetic screening. Sickle cell disease (SCD) is caused by a monogenetic disorder due to a single base-pair point mutation in the β-globin gene. The phenotypic variability of the disease is defined by repeated pain crises, chronic hemolytic anemia, and heightened susceptibility to infections (Inusa et al., 2019).

SCD is an autosomal recessive condition, and its gender does not affect prevalence. There are, however, sex-related differences in SCD mortality and morbidity among adult patients, with increased mortality in men (Ceglie et al., 2019).

Results of the Karyotype

Karyotype testing is necessary for the identification and treatment of different diseases. Positive results show unanticipated alterations in the number or organization of chromosomes, while negative results verify the lack of such mutations. Aberrant results can give information about the patient’s or child’s health depending on the chromosome mutations detected (Shi et al., 2019).

Genetic Counselor’s Explanation

Karyotype testing, in detecting genetic mutations on chromosome 11, may not completely diagnose sickle cell anemia and calls for further examinations, such as genetic and prenatal tests.

Positive and Negative Ramifications of Genetic Testing

Genetic screening for uncommon diseases triggers ethical implications concerning people, organizations, and health systems (Kruse et al., 2022).

Positive Ramifications:

• Accelerated genetic diagnosis progress, especially with next-generation sequencing technologies.
• Early and correct diagnosis decreases the demand for invasive, expensive testing.

Negative Ramifications:

• Ethical considerations like confidentiality with disease revelation to family members.
• Ethical concerns in post-mortem genetic testing counseling.
• Laboratories will have low interest in genetic testing for sporadic disorders due to low volume of tests and high development costs (Kruse et al., 2022).

Impact of Positive and Negative Ramifications

The mutation found on the 11th chromosome enables Sandra to treat her child more effectively, prepare for future pregnancies, but is dangerous for her other children because of higher probabilities of inheriting sickle cell anemia (Shah & Krishnamurti, 2021).

Conclusion

Genetic testing is an important tool for the identification of an individual’s genetic constitution and the detection of mutations causing particular medical conditions. The examination of karyotype is essential for early disease detection and treatment. Although genetic testing provides advantages like early disease detection, ethical issues of identification are of major concern.

BIO FPX 1000 Assessment 5 Genetics Lab

Kruse, J., Mueller, R., Aghdassi, A. A., Lerch, M. M., & Salloch, S. (2022). Genetic testing for rare diseases: A systematic review of ethical aspects. Frontiers in Genetics, 12. https://doi.org/10.3389/fgene.2021.701988

Shah, N., & Krishnamurti, L. (2021). Evidence-based minireview: In young children with severe sickle cell disease, do the benefits of HLA-identical sibling donor HCT surpass the risks? Hematology, 2021(1), 190–195. https://doi.org/10.1182/hematology.2021000322

Shi, Y., Ma, J., Xue, Y., Wang, J., Yu, B., & Wang, T. (2019). The assessment of combined karyotype analysis and chromosomal microarray in pregnant women of advanced maternal age: a multicenter study. Annals of Translational Medicine, 7(14), 318–318. https://doi.org/10.21037/atm.2019.06.63