Multifactorial Diseases Overview

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Questions and Answers

What characterizes multifactorial diseases compared to single-gene disorders?

They are caused by multiple genes and not solely by one mutation. (correct)
They can only be diagnosed through genetic testing.
They have a straightforward inheritance pattern.
They are always passed from parents to offspring.

Why is it challenging for doctors to determine a person’s risk for developing a multifactorial disease?

All multifactorial diseases are linked to environmental factors.
The genetic influence varies widely between individuals. (correct)
They often manifest without any family history. (correct)
Because multifactorial diseases are always severe.

How can the genetic component of multifactorial diseases be identified within families?

Through the study of environmental influences on health.
By classifying the degree of relationship between family members. (correct)
By analyzing the sex chromosomes of family members.
Using a genetic test that identifies single-gene mutations.

Which statement is true regarding the gender prevalence of multifactorial diseases?

<p>They can occur more frequently in one gender but are not linked to sex chromosomes. (C)</p> Signup and view all the answers

In which population may the genetic component of a multifactorial disease occur more frequently?

<p>In homogeneous ethnic groups with shared genetic backgrounds. (D)</p> Signup and view all the answers

Flashcards

Multifactorial Disease

A disease caused by multiple genes and often influenced by environmental factors. It's not directly inherited like single-gene disorders.

Genetic Component in Multifactorial Disease

While multifactorial diseases aren't passed down like single-gene disorders, there's still a genetic influence, making it more likely to occur in families.

Lack of Clear Inheritance in Multifactorial Diseases

Multifactorial diseases don't have a straightforward inheritance pattern like dominant or recessive traits.

Multifactorial Disease Occurrence by Gender

While not linked to sex chromosomes, some multifactorial diseases might appear more often in one gender.

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Ethnicity and Multifactorial Disease

Certain ethnic groups might experience a higher frequency of specific multifactorial diseases.

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Study Notes

Multifactorial Diseases

Multifactorial diseases are caused by more than one gene.
Unlike single-gene disorders, inheritance is not always direct from parent to offspring.
A child with the disease may have unaffected parents.
Genetic component can still run in families.
No clear inheritance pattern exists.
Predicting risk is difficult for doctors.
Scientists assess family relationships to understand genetic similarity.
Disease prevalence can differ between genders, but not sex-linked.
Disease prevalence can vary among ethnic groups.