Question 1

Which inheritance pattern is demonstrated when heterozygotes express an intermediate phenotype between two homozygotes, such as pink flowers resulting from red and white snapdragons?

Accepted Answer

Incomplete dominance

Question 2

In a dihybrid cross between two heterozygous pea plants (YyRr x YyRr), what is the probability of obtaining an offspring with genotype yyrr?

Accepted Answer

$$\frac{1}{16}$$

Question 3

A person with genotype IAIB for the ABO blood group will have which phenotype?

Accepted Answer

Type AB

Question 4

Which equation correctly represents the probability of two independent events both occurring, such as the probability of getting heads on two coin tosses?

Accepted Answer

$$P = P_1$ 	imes P_2$

Question 5

Which inheritance pattern is illustrated by the MN blood group, where both M and N surface molecules are fully expressed in heterozygotes?

Accepted Answer

Codominance

Question 6

If an individual has genotype AaBBccDd, how many different types of gametes can they produce, assuming independent assortment?

Accepted Answer

4

Question 7

Which scenario best describes epistasis, as seen in mice coat color genetics?

Accepted Answer

One gene controls the expression of another gene

Question 8

A cross between two snapdragons with genotype CRCW produces offspring in the F2 generation. What is the expected phenotypic ratio?

Accepted Answer

1:2:1

Question 9

Which of the following best explains quantitative variation in traits such as human height?

Accepted Answer

Polygenic inheritance

Question 10

Hydrangea flower color varies depending on soil pH. This is an example of which inheritance pattern?

Accepted Answer

Multifactorial inheritance

Question 11

Which genotype would result in a person with type O blood?

Accepted Answer

ii

Question 12

A person with phenylketonuria (PKU) exhibits multiple symptoms affecting different body systems. This is an example of:

Accepted Answer

Pleiotropy

Question 13

If two parents with genotype Bb mate, what is the probability that their offspring will have the recessive phenotype?

Accepted Answer

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

Question 14

Which of the following is NOT a characteristic of polygenic inheritance?

Accepted Answer

Discrete phenotypic classes

Question 15

In a trihybrid cross (PpYyRr x PpYyRr), how many different types of gametes can each parent produce?

Accepted Answer

8

Question 16

Which of the following best describes the gene dosage effect observed in incomplete dominance?

Accepted Answer

The phenotype depends on the number of functioning alleles

Question 17

Which of the following is an example of a trait with qualitative variation?

Accepted Answer

Pea plant flower color (purple or white)

Question 18

If gene C is epistatic to gene B in mice, what happens to the coat color if the genotype is cc regardless of the B gene?

Accepted Answer

The mouse will be albino (no pigment)

Question 19

Which of the following best describes the relationship between genotype and phenotype in complete dominance?

Accepted Answer

Heterozygotes express only the dominant allele's phenotype

Question 20

Which of the following is a real-world example of multifactorial inheritance?

Accepted Answer

Hydrangea flower color varying with soil pH

Chapter 14 (part 2) Lecture Notes

Study Guide - Practice Questions

Study Guide - Flashcards