HONORS BIOLOGY - FINAL EXAM REVIEW
WITH DIAGRAM
480+ (Fully Updated 2026) Exam Questions + Verified & Rationalized
Answers | A+ Graded
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 488 Qs
This "Honors Biology - Final Exam Review WITH DIAGRAM" document covers fundamental genetics
concepts, including Mendelian inheritance, inheritance patterns, and probability-based predictions. It
provides 488 questions with correct answers, accompanied by detailed explanations and rationales,
along with diagrams for visual aids. This comprehensive resource enables students to thoroughly review
and understand genetics concepts, facilitating deeper comprehension and exam preparation .
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
Offspring that result from crosses between true-breeding parents with different traits are called
_______.
CORRECT ANSWER
hybrids
RATIONALE: True-breeding parents are individuals that consistently produce offspring with the same trait as themselves
when crossed with another true-breeding individual of the same trait. When true-breeding parents with different traits are
crossed, their offspring will exhibit a combination of both traits, making them hybrids.
Trusted by thousands of students and professionals worldwide Page 1 of 185
, QUESTION 2
Who concluded that traits are inherited through the passing of factors from parents to offspring?
CORRECT ANSWER
Gregor Mendel
RATIONALE: Gregor Mendel's work on pea plants demonstrated the fundamental principles of inheritance, showing that
traits are determined by discrete factors, now known as genes, which are passed from parents to offspring through the
transmission of traits from one generation to the next. His experiments and observations laid the foundation for modern
genetics by revealing the patterns of inheritance that underlie the variation of traits in offspring.
QUESTION 3
When Mendel crossed true-breeding tall plants with true-breeding short plants what was the genotype
and phenotype of all the offspring?
CORRECT ANSWER
genotype: Tt
phenotype: tall
RATIONALE: When Mendel crossed true-breeding tall plants with true-breeding short plants, he was essentially crossing
two different genotypes, resulting in a mixture of both traits in the offspring, but since the tall plants are true-breeding,
they must have a dominant allele for height. In this case, the genotype "Tt" indicates the presence of a dominant allele (T)
for tallness and a recessive allele (t) for shortness, resulting in the phenotype "tall" because the dominant allele masks the
effect of the recessive allele.
QUESTION 4
What can the principles of probability be used to predict?
CORRECT ANSWER
genetic traits of offspring
RATIONALE: The principles of probability can be used to predict the genetic traits of offspring by analyzing the probability
of different genetic combinations based on the genetic traits of their parents, taking into account the rules of Mendelian
inheritance and the laws of probability. This allows us to calculate the likelihood of certain traits being passed down,
enabling us to make informed predictions about the genetic makeup of the offspring.
Trusted by thousands of students and professionals worldwide Page 2 of 185
, QUESTION 5
If a white hen and a black rooster produce an erminette color offspring what type of inheritance would
this be known as?
CORRECT ANSWER
codominance
RATIONALE: In this scenario, the erminette color offspring would exhibit a combination of the white hen's and black
rooster's color traits, where both genes have an equal influence on the final phenotype, demonstrating a balanced
expression of both alleles. This balanced expression of both alleles is characteristic of codominance, where neither allele is
recessive or dominant, resulting in the visible combination of both traits in the offspring.
QUESTION 6
Why did Thomas Hunt Morgan choose to study fruit flies?
CORRECT ANSWER
they produced a large amount of offspring in little time
RATIONALE: Thomas Hunt Morgan chose to study fruit flies because their short generation time, typically around seven to
ten days, allows for rapid breeding and the ability to observe multiple generations in a relatively short period. This enabled
Morgan to conduct experiments and collect data efficiently, which was crucial for his genetic research.
QUESTION 7
If an organism's diploid number is 12, its haploid number is
CORRECT ANSWER
6
RATIONALE: The diploid number of an organism is the total number of chromosomes in its cells when it has two copies of
each chromosome, while the haploid number is the total number of chromosomes in its cells when it has only one copy of
each chromosome. Since the organism's diploid number is 12, it means there are 12 pairs of chromosomes, and when the
organism is haploid, each pair is split, resulting in 12 single chromosomes, or 6 pairs, but actually just 6 chromosomes since
each pair is only 1 chromosome.
QUESTION 8
If an organism's haploid number is 6, its diploid number is
CORRECT ANSWER
12
RATIONALE: The haploid number refers to the number of chromosomes in an organism's single set of chromosomes, while
the diploid number represents the total number of chromosomes when the organism has two sets (one from each parent).
When an organism has two sets of chromosomes, each set containing 6 chromosomes, the total number of chromosomes
(diploid number) is therefore 6 + 6 = 12.
Trusted by thousands of students and professionals worldwide Page 3 of 185
, QUESTION 9
During which phase of meiosis do the chromosomes form tetrads?
CORRECT ANSWER
Prophase I of Meiosis I
RATIONALE: During Prophase I of Meiosis I, homologous chromosomes pair up and form synaptonemal complexes, which
bring them into close proximity and enable the exchange of genetic material through crossing over, resulting in the
formation of tetrads. The formation of tetrads is a unique characteristic of Prophase I, where each tetrad consists of two
homologous chromosomes that are held together by a synaptonemal complex.
QUESTION 10
Which types of genes are on the same chromosome?
CORRECT ANSWER
linked
RATIONALE: Linked genes are located on the same chromosome because chromosomes are thread-like structures
composed of DNA and proteins, and the genes on a chromosome are physically connected in a linear sequence. As a result,
when one gene is inherited, the linked genes on the same chromosome are also inherited together, due to their physical
proximity on the chromosome.
QUESTION 11
principle of dominance
CORRECT ANSWER
some alleles are dominant and others are recessive
RATIONALE: The principle of dominance states that when two alleles of a gene have different effects, one allele will be fully
expressed and mask the effect of the other, illustrating the idea that dominant alleles have a more significant impact on the
trait. This concept is fundamental in genetics, allowing scientists to predict the outcome of gene interactions and
understand how traits are inherited.
QUESTION 12
Today, Mendel's factors that determine traits are called _______.
CORRECT ANSWER
genes
RATIONALE: Mendel's factors that determine traits are called genes because they are the basic units of heredity, consisting
of DNA sequences that carry information from one generation to the next. This understanding is rooted in the discovery of
the structure of DNA by James Watson and Francis Crick, which revealed that genetic information is encoded in the
sequence of nucleotides that make up genes.
Trusted by thousands of students and professionals worldwide Page 4 of 185
WITH DIAGRAM
480+ (Fully Updated 2026) Exam Questions + Verified & Rationalized
Answers | A+ Graded
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 488 Qs
This "Honors Biology - Final Exam Review WITH DIAGRAM" document covers fundamental genetics
concepts, including Mendelian inheritance, inheritance patterns, and probability-based predictions. It
provides 488 questions with correct answers, accompanied by detailed explanations and rationales,
along with diagrams for visual aids. This comprehensive resource enables students to thoroughly review
and understand genetics concepts, facilitating deeper comprehension and exam preparation .
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
Offspring that result from crosses between true-breeding parents with different traits are called
_______.
CORRECT ANSWER
hybrids
RATIONALE: True-breeding parents are individuals that consistently produce offspring with the same trait as themselves
when crossed with another true-breeding individual of the same trait. When true-breeding parents with different traits are
crossed, their offspring will exhibit a combination of both traits, making them hybrids.
Trusted by thousands of students and professionals worldwide Page 1 of 185
, QUESTION 2
Who concluded that traits are inherited through the passing of factors from parents to offspring?
CORRECT ANSWER
Gregor Mendel
RATIONALE: Gregor Mendel's work on pea plants demonstrated the fundamental principles of inheritance, showing that
traits are determined by discrete factors, now known as genes, which are passed from parents to offspring through the
transmission of traits from one generation to the next. His experiments and observations laid the foundation for modern
genetics by revealing the patterns of inheritance that underlie the variation of traits in offspring.
QUESTION 3
When Mendel crossed true-breeding tall plants with true-breeding short plants what was the genotype
and phenotype of all the offspring?
CORRECT ANSWER
genotype: Tt
phenotype: tall
RATIONALE: When Mendel crossed true-breeding tall plants with true-breeding short plants, he was essentially crossing
two different genotypes, resulting in a mixture of both traits in the offspring, but since the tall plants are true-breeding,
they must have a dominant allele for height. In this case, the genotype "Tt" indicates the presence of a dominant allele (T)
for tallness and a recessive allele (t) for shortness, resulting in the phenotype "tall" because the dominant allele masks the
effect of the recessive allele.
QUESTION 4
What can the principles of probability be used to predict?
CORRECT ANSWER
genetic traits of offspring
RATIONALE: The principles of probability can be used to predict the genetic traits of offspring by analyzing the probability
of different genetic combinations based on the genetic traits of their parents, taking into account the rules of Mendelian
inheritance and the laws of probability. This allows us to calculate the likelihood of certain traits being passed down,
enabling us to make informed predictions about the genetic makeup of the offspring.
Trusted by thousands of students and professionals worldwide Page 2 of 185
, QUESTION 5
If a white hen and a black rooster produce an erminette color offspring what type of inheritance would
this be known as?
CORRECT ANSWER
codominance
RATIONALE: In this scenario, the erminette color offspring would exhibit a combination of the white hen's and black
rooster's color traits, where both genes have an equal influence on the final phenotype, demonstrating a balanced
expression of both alleles. This balanced expression of both alleles is characteristic of codominance, where neither allele is
recessive or dominant, resulting in the visible combination of both traits in the offspring.
QUESTION 6
Why did Thomas Hunt Morgan choose to study fruit flies?
CORRECT ANSWER
they produced a large amount of offspring in little time
RATIONALE: Thomas Hunt Morgan chose to study fruit flies because their short generation time, typically around seven to
ten days, allows for rapid breeding and the ability to observe multiple generations in a relatively short period. This enabled
Morgan to conduct experiments and collect data efficiently, which was crucial for his genetic research.
QUESTION 7
If an organism's diploid number is 12, its haploid number is
CORRECT ANSWER
6
RATIONALE: The diploid number of an organism is the total number of chromosomes in its cells when it has two copies of
each chromosome, while the haploid number is the total number of chromosomes in its cells when it has only one copy of
each chromosome. Since the organism's diploid number is 12, it means there are 12 pairs of chromosomes, and when the
organism is haploid, each pair is split, resulting in 12 single chromosomes, or 6 pairs, but actually just 6 chromosomes since
each pair is only 1 chromosome.
QUESTION 8
If an organism's haploid number is 6, its diploid number is
CORRECT ANSWER
12
RATIONALE: The haploid number refers to the number of chromosomes in an organism's single set of chromosomes, while
the diploid number represents the total number of chromosomes when the organism has two sets (one from each parent).
When an organism has two sets of chromosomes, each set containing 6 chromosomes, the total number of chromosomes
(diploid number) is therefore 6 + 6 = 12.
Trusted by thousands of students and professionals worldwide Page 3 of 185
, QUESTION 9
During which phase of meiosis do the chromosomes form tetrads?
CORRECT ANSWER
Prophase I of Meiosis I
RATIONALE: During Prophase I of Meiosis I, homologous chromosomes pair up and form synaptonemal complexes, which
bring them into close proximity and enable the exchange of genetic material through crossing over, resulting in the
formation of tetrads. The formation of tetrads is a unique characteristic of Prophase I, where each tetrad consists of two
homologous chromosomes that are held together by a synaptonemal complex.
QUESTION 10
Which types of genes are on the same chromosome?
CORRECT ANSWER
linked
RATIONALE: Linked genes are located on the same chromosome because chromosomes are thread-like structures
composed of DNA and proteins, and the genes on a chromosome are physically connected in a linear sequence. As a result,
when one gene is inherited, the linked genes on the same chromosome are also inherited together, due to their physical
proximity on the chromosome.
QUESTION 11
principle of dominance
CORRECT ANSWER
some alleles are dominant and others are recessive
RATIONALE: The principle of dominance states that when two alleles of a gene have different effects, one allele will be fully
expressed and mask the effect of the other, illustrating the idea that dominant alleles have a more significant impact on the
trait. This concept is fundamental in genetics, allowing scientists to predict the outcome of gene interactions and
understand how traits are inherited.
QUESTION 12
Today, Mendel's factors that determine traits are called _______.
CORRECT ANSWER
genes
RATIONALE: Mendel's factors that determine traits are called genes because they are the basic units of heredity, consisting
of DNA sequences that carry information from one generation to the next. This understanding is rooted in the discovery of
the structure of DNA by James Watson and Francis Crick, which revealed that genetic information is encoded in the
sequence of nucleotides that make up genes.
Trusted by thousands of students and professionals worldwide Page 4 of 185
