Question 1

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

Accepted Answer

Each individual has two alleles for a trait, and these alleles separate during gamete formation so each gamete receives only one allele.

Question 2

In Mendel’s pea plant experiments, what was the observed phenotypic ratio in the F2 generation of a monohybrid cross?

Accepted Answer

$$3:1$$

Question 3

Which technique did Mendel use to ensure that his pea plants were true-breeding for specific traits?

Accepted Answer

He utilized self-fertilization to create pure-breeding lines.

Question 4

What is the genotype ratio expected in the F2 generation of a monohybrid cross between two heterozygous parents ($$Pp 	imes Pp$$)?

Accepted Answer

$$1:2:1 (PP$$:Pp:pp)

Question 5

Why did Mendel’s results contradict the blending theory of inheritance?

Accepted Answer

Because traits reappeared unchanged in the F2 generation, showing no blending.

Question 6

Which of the following is a correct definition of 'allele'?

Accepted Answer

A version (sequence variant) of a gene.

Question 7

A testcross is used to determine the genotype of an individual with a dominant phenotype. Which parent is used in the testcross?

Accepted Answer

A homozygous recessive individual.

Question 8

Which event during meiosis is the physical basis for Mendel’s Law of Segregation?

Accepted Answer

Separation of homologous chromosomes during anaphase I.

Question 9

If a purple-flowered pea plant (dominant) is crossed with a white-flowered pea plant (recessive), and all offspring are purple, what is the genotype of the purple parent?

Accepted Answer

Homozygous dominant ($$PP)$$

Question 10

Which of the following human traits is commonly cited as an example of simple Mendelian inheritance, even though most human traits are polygenic?

Accepted Answer

Widow's peak

Question 11

What is the expected outcome when a heterozygous purple-flowered pea plant ($$Pp) is $$testcrossed with a white-flowered pea plant ($$pp$$)?

Accepted Answer

Half of the offspring will have purple flowers, and half will have white flowers.

Question 12

Which of the following best explains why the recessive trait reappears in the F2 generation of a monohybrid cross?

Accepted Answer

Recessive alleles are masked by dominant alleles in heterozygotes but segregate independently during gamete formation.

Question 13

Which of the following is NOT one of Mendel’s foundational strategies in his genetic experiments?

Accepted Answer

Random selection of traits without quantification

Question 14

If a plant is homozygous for a trait, what does this mean?

Accepted Answer

It has two identical alleles for the trait.

Question 15

Which statement about dominant and recessive alleles is correct?

Accepted Answer

A dominant allele is expressed if present, while a recessive allele is masked in heterozygotes.

Question 16

Which of the following best describes the genotype of a true-breeding plant?

Accepted Answer

Homozygous

Question 17

What is the purpose of using a Punnett square in genetics?

Accepted Answer

To predict the probable genotypes and phenotypes of offspring from a cross.

Question 18

Which process results in the production of four genetically different daughter cells?

Accepted Answer

Meiosis

Question 19

Which of the following is a real-world example of a trait that follows simple Mendelian inheritance?

Accepted Answer

Freckles

Mendelian Genetics: Transmission Genetics and the Law of Segregation

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