Question 1

Which of the following best describes the inheritance pattern of autosomal dominant traits?

Accepted Answer

Affected individuals appear in every generation and both sexes are equally affected.

Question 2

In the pedigree shown, what is the probability that an unaffected individual will transmit an autosomal dominant trait to their offspring?

Accepted Answer

0%

Question 3

Pseudoachondroplasia is an example of which type of genetic inheritance?

Accepted Answer

Autosomal dominant

Question 4

If a person with an autosomal dominant disorder (heterozygous) marries an unaffected individual, what is the expected proportion of affected offspring?

Accepted Answer

$$\frac{1}{2}$$

Question 5

Which of the following statements about autosomal dominant inheritance is FALSE?

Accepted Answer

Unaffected individuals can transmit the trait to their offspring.

Question 6

A pedigree shows a trait present in every generation, affecting both males and females equally. What is the most likely mode of inheritance?

Accepted Answer

Autosomal dominant

Question 7

Which of the following conditions is NOT typically inherited in an autosomal dominant manner?

Accepted Answer

Hemophilia

Question 8

If both parents are heterozygous for an autosomal dominant trait, what is the probability that their child will be unaffected?

Accepted Answer

$$\frac{1}{4}$$

Question 9

Which of the following is a key feature of autosomal dominant inheritance as shown in the pedigree diagrams?

Accepted Answer

Affected individuals have at least one affected parent.

Question 10

In a family with an autosomal dominant disorder, what is the expected genotype ratio among the offspring of two heterozygous parents?

Accepted Answer

$$1:2:1 ($$homozygous dominant : heterozygous : homozygous recessive)

Question 11

Which of the following best explains why autosomal dominant traits do not skip generations?

Accepted Answer

Affected individuals must have at least one affected parent.

Question 12

If an unaffected individual has two affected parents for an autosomal dominant trait, what is their genotype?

Accepted Answer

Homozygous recessive ($$aa)$$

Question 13

Which of the following is a real-world example of an autosomal dominant disorder?

Accepted Answer

Huntington’s disease

Question 14

In a pedigree, if an affected individual has two unaffected parents, what does this suggest about the inheritance pattern?

Accepted Answer

The trait is not autosomal dominant.

Question 15

Which of the following statements about autosomal dominant inheritance is TRUE?

Accepted Answer

Both males and females can transmit the trait to their offspring.

Extensions and Modifications of Basic Principles in Genetics

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