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Principles of Inheritance and Variation - Chromosome and DNA Mutation Quiz

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Principles of Inheritance and Variation - Chromosome and DNA Mutation Quiz

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Questions and Answers

What is the main reason that color blindness occurs more frequently in males than females?

Males have a single X chromosome, while females have two, making them more susceptible to X-linked recessive disorders. (correct)

Color blindness is more prevalent in certain ethnic groups, and males are more likely to belong to those groups.

Females have a stronger immune system that can better fight against the genetic defects that cause color blindness.

Males are more exposed to environmental factors that can lead to color blindness.

What is the approximate percentage of females who are affected by red-green color blindness?

25%

50%

0.4% (correct)

Which type of inheritance pattern is used to explain the pedigree shown in Figure 4.14(a)?

X-linked dominant

Autosomal recessive

X-linked recessive

Autosomal dominant (correct)

What type of genetic disorder is color blindness?

X-linked recessive Signup and view all the answers

What is the approximate percentage of males affected by red-green color blindness?

8% Signup and view all the answers

What is the primary function of DNA in the chromosome?

To carry genetic information Signup and view all the answers

What is the term used to describe a change or alteration in the genetic material?

Mutation Signup and view all the answers

Which of the following is a characteristic of Mendelian disorders?

They are mainly determined by alteration or mutation in a single gene Signup and view all the answers

What is the primary way to understand whether a Mendelian disorder is dominant or recessive?

Analyzing the pattern of inheritance through family history Signup and view all the answers

Which of the following is an example of an X-linked recessive Mendelian disorder?

Haemophilia Signup and view all the answers