Question 1

Which of the following best describes Mendel’s Law of Segregation?

Accepted Answer

Each organism inherits two alleles for each gene, but only one allele from each parent is present in each gamete due to random segregation during gamete formation.

Question 2

A pea plant with genotype $$SsYy is $$self-fertilized. According to Mendel’s Law of Independent Assortment, what is the probability of obtaining an offspring with genotype $$ssyy$$?

Accepted Answer

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

Question 3

Which of the following is a real-world example that contradicts the theory of blending inheritance?

Accepted Answer

The reappearance of recessive traits in the F2 generation of Mendel’s pea plant experiments.

Question 4

In a testcross, a plant with the dominant phenotype but unknown genotype is crossed with a homozygous recessive plant. If the unknown plant is heterozygous, what phenotypic ratio is expected in the offspring?

Accepted Answer

1:1 dominant:recessive

Question 5

A dihybrid cross between two $$SsYy$$ pea plants produces four phenotypic classes. What is the expected phenotypic ratio among the F2 offspring?

Accepted Answer

9:3:3:1

Question 6

Which of the following statements about Mendel’s experimental methods is FALSE?

Accepted Answer

He studied only traits with continuous variation.

Question 7

If a plant with genotype $$Aa is $$self-fertilized, what is the probability that an offspring will be homozygous recessive?

Accepted Answer

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

Question 8

Which of the following best explains why Mendel’s results were not immediately recognized by the scientific community?

Accepted Answer

His work was published in an obscure journal and not widely read.

Question 9

A plant with genotype $$Rr ($$round seeds) is crossed with a plant with genotype $$rr ($$wrinkled seeds). What proportion of the offspring will have round seeds?

Accepted Answer

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

Question 10

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

Accepted Answer

They have a long generation time.

Question 11

In a trihybrid cross ($$AaBbCc 	imes AaBbCc$$), what is the probability of obtaining an offspring with genotype $$aabbcc$$?

Accepted Answer

$$\frac{1}{64}$$

Question 12

Which of the following best describes a phenotype?

Accepted Answer

The observable traits or behaviors of an organism.

Question 13

A population of corn is produced by crossing a true-breeding yellow kernel plant ($$WW) $$with a true-breeding white kernel plant ($$ww). $$The F1 generation is self-fertilized. What is the expected ratio of yellow to white kernels in the F2 generation?

Accepted Answer

3:1

Question 14

Which of the following is a key insight from Mendel’s F3 generation experiments?

Accepted Answer

Not all individuals with the dominant phenotype are genetically identical.

Question 15

Which of the following is an example of a continuously variable trait?

Accepted Answer

Human height

Question 16

If a plant with genotype $$AaBb is $$crossed with a plant with genotype $$aabb$$, what is the probability of obtaining an offspring with genotype $$Aabb$$?

Accepted Answer

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

Question 17

Which of the following best describes the purpose of the chi-square test in genetics?

Accepted Answer

To determine whether observed results differ significantly from expected results due to random chance.

Question 18

Which of the following statements about alleles is TRUE?

Accepted Answer

Alleles are different versions of the same gene.

Question 19

Which of the following is NOT a feature of Mendel’s experimental design that contributed to his success?

Accepted Answer

He studied traits controlled by multiple genes.

Mendelian Genetics: Principles of Heredity and Transmission

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