Question 1

Which principle states that the two alleles for a gene must separate into different gametes during meiosis?

Accepted Answer

Principle of segregation

Question 2

A diploid cell contains two alleles for each gene. If a gene has five different alleles in the population, how many alleles for that gene could be found in a single diploid cell?

Accepted Answer

At most two

Question 3

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

Accepted Answer

$$3:1$$

Question 4

A pea plant with genotype Pp is ________ and has the ______ phenotype.

Accepted Answer

heterozygous; dominant

Question 5

If a heterozygous pea plant for seed color (Yy) is crossed with a pea plant with green seeds (yy), what percentage of offspring will be heterozygous?

Accepted Answer

$$50\%$$

Question 6

Which of the following best explains why Mendel’s results did not support the blending inheritance hypothesis?

Accepted Answer

Hereditary determinants (alleles) remained unchanged from generation to generation

Question 7

In a dihybrid cross between two heterozygous pea plants (RrYy x RrYy), what is the expected phenotypic ratio for the offspring if the genes assort independently?

Accepted Answer

$$9:3:3:1$$

Question 8

Which mechanism explains Mendel’s principle of independent assortment?

Accepted Answer

Genes located on different chromosomes assort independently during meiosis

Question 9

If genes are linked (on the same chromosome), which of the following is true?

Accepted Answer

Mendelian predictions do not hold

Question 10

A plant with genotype ggPp is crossed with a dihybrid plant GgPp. If 175 offspring are produced, how many are expected to have yellow pods and white flowers, assuming independent assortment?

Accepted Answer

21.9 offspring

Question 11

Which of the following is NOT a key mechanism underlying Mendel’s results?

Accepted Answer

Blending inheritance

Question 12

What is the genotype ratio for the F2 generation in a monohybrid cross (Rr x Rr) for seed shape?

Accepted Answer

$$1\ RR : 2\ Rr : 1\ rr$$

Question 13

Which statement best describes a homozygous individual?

Accepted Answer

Has two copies of the same allele for a gene

Question 14

In Mendel’s experiments, what was the significance of using pure-breeding lines?

Accepted Answer

They produced offspring identical to the parents for the phenotype of interest

Question 15

Which of the following best describes the outcome of a cross between two heterozygous pea plants for flower color (Pp x Pp)?

Accepted Answer

75% will have purple flowers, 25% will have white flowers

Question 16

Which of the following is a real-world application of Mendel’s principles in agriculture?

Accepted Answer

Predicting the outcome of crosses between different crop varieties

Question 17

Which equation represents the probability of obtaining a homozygous recessive offspring from a monohybrid cross (Rr x Rr)?

Accepted Answer

$$P(rr) = \frac{1}{4}$$

Question 18

If a gene is located on the same chromosome as another gene, what process can sometimes allow them to assort independently?

Accepted Answer

Crossing over

Question 19

Which of the following best describes the principle of independent assortment?

Accepted Answer

Alleles of different genes segregate independently during meiosis

Question 20

In a cross between a plant with genotype RrYy and a plant with genotype rryy, what fraction of the offspring are expected to have round seeds and yellow seeds, assuming independent assortment?

Accepted Answer

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

Mendelian Inheritance Patterns: Principles, Experiments, and Applications

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