Q: Which equation can be used to calculate the probability of two independent events both occurring?

$$P(A \times B) = P(A) \times P(B)$$

Question 1

Which of the following statements best describes Mendel's law of independent assortment?

Accepted Answer

Alleles of a pair of separate genes are assorted independently during gamete formation.

Question 2

A cross between two organisms that are heterozygous for two traits (AaBb x AaBb) is called a dihybrid cross. What is the expected phenotypic ratio in the offspring?

Accepted Answer

$$9:3:3:1$$

Question 3

If a woman with blood type AB and a man with blood type O have a child, what is the probability that the child will have blood type A?

Accepted Answer

$$0.5$$

Question 4

Which of the following is an example of incomplete dominance?

Accepted Answer

A cross between red and white flowers produces pink flowers.

Question 5

In a test cross, an individual of unknown genotype is crossed with a homozygous recessive individual. If all offspring show the dominant phenotype, what is the genotype of the unknown parent?

Accepted Answer

Homozygous dominant

Question 6

Which equation can be used to calculate the probability of two independent events both occurring?

Accepted Answer

$$P(A 	imes B) = P(A) 	imes P(B)$$

Question 7

Which of the following best explains pleiotropy?

Accepted Answer

One gene influences multiple traits.

Question 8

A male inherits a sex-linked recessive allele from his mother. What is the probability that he will express the trait?

Accepted Answer

$$1.0$$

Question 9

Which of the following is NOT a reason Mendel chose pea plants for his experiments?

Accepted Answer

They have a long generation time.

Question 10

If two parents are both carriers for cystic fibrosis (heterozygous), what is the probability that their child will have cystic fibrosis?

Accepted Answer

$$0.25$$

Question 11

Which of the following best describes codominance?

Accepted Answer

Both alleles are fully expressed in the phenotype.

Question 12

A monohybrid cross involves individuals that are heterozygous for how many traits?

Accepted Answer

One

Question 13

Which of the following is a real-world example of a trait affected by both genetic and environmental factors?

Accepted Answer

Height in humans

Question 14

What is the genotype of an individual who is homozygous recessive for a trait?

Accepted Answer

aa

Question 15

Which of the following best describes the phenotype of an individual?

Accepted Answer

The observable physical and physiological traits

Question 16

If a trait is determined by more than one gene, it is called:

Accepted Answer

Polygenic inheritance

Question 17

Which of the following is true about the blending hypothesis?

Accepted Answer

It was disproven by Mendel's experiments.

Question 18

What is the probability that two heterozygous parents (Aa x Aa) will have a homozygous dominant child?

Accepted Answer

$$0.25$$

Question 19

Which of the following is a consequence of crossing over during meiosis?

Accepted Answer

Increased genetic variation in gametes

Question 20

Which of the following is true about sex-linked traits?

Accepted Answer

They are often found on the X chromosome.

Mendelian Genetics and Patterns of Inheritance

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